\input texinfo @c -*-texinfo-*- @c %**start of header @setfilename emms.info @settitle The Emms Manual @c %**end of header @c History: The Emms manual was almost entirely rewritten for the @c release of Emms version 2. @dircategory Emacs @direntry * Emms: (emms). The Emacs Multimedia System @end direntry @copying @copyright{} 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2014, 2015, 2016, 2020, 2021 Free Software Foundation, Inc. @quotation Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License". @end quotation @end copying @c For printed material @titlepage @title The Emms Manual @page @vskip 0pt plus 1filll @insertcopying @end titlepage @contents @c END For printed material @ifnottex @node Top, Introduction, (dir), (dir) @top Emms Manual This is the Manual for the Emacs Multimedia System. @insertcopying @menu Starting out * Introduction:: Introduction to Emms. * Quickstart Guide:: First steps with Emms for new users. * Installation:: How to install Emms on your System. * Setup:: How to setup Emms. * Configuration:: More detailed setup and configuration. * Getting Help:: Where to get help with Emms and make suggestions. * Formats and Freedom:: File formats without restrictions. Emms basics * Basic Commands:: How to control Emms with ease. * The Core File:: The inner core of Emms. * Sources:: Sources for playlists-creation. * Simple Players:: Some simple players. * Playlists:: How Emms organizes media. Advanced Features * Track Information:: More narrative track descriptions. * Interactive Playlists:: Interactive Playlists. * Markable Playlists:: Allow tracks to be marked. * Extending Emms:: How to define new players and modules. Modules and Extensions * The Browser:: Advanced metadata browsing. * Sorting Playlists:: Sorting the order of the tracks. * Persistent Playlists:: Restoring playlists on emacs startup. * Editing Tracks:: Editing track information from within Emms. * Emms Mode Line:: Emms information on the mode line. * Limiting:: Derive a new playlist from the current. * Music Player Daemon:: Interface to Music Player Daemon. * Lyrics:: Displaying lyrics synchronously. * Volume:: Changing the volume. * Streaming Audio:: Interface to streaming audio. * APE / FLAC Commands:: How to play next or previous track in these files. * Bookmarks:: Saving a place in a media file. * Managing Playlists:: Managing multiple playlists. * GNU FM:: Connect to music community websites. Copying and license * Copying:: The GNU General Public License gives you permission to redistribute Emms on certain terms; it also explains that there is no warranty. * The GNU FDL:: The license for this documentation. Indices * Concept Index:: * Function Index:: * Variable Index:: * Keybinding Index:: @detailmenu --- The Detailed Node Listing --- Here are some other nodes which are really inferiors of the ones already listed, mentioned here so you can get to them in one step: Installation * Compiling Emms:: Compiling Emms into Byte-Code. The Core File * User Variables:: Variables for the user to tweak. * Hooks:: Hooks for important Emms functions. * Core Functions:: Providing the basic functionality of Emms. Track Information * Metadata Utilities:: Supported external metadata utilities. * Defining Info Methods:: Defining new info methods. Extending Emms * New Player:: How to define a new player. * Simple Player for `play':: Example player using @command{play}. * More Complex Player:: Example of a complex player using @command{mpg321}. @end detailmenu @end menu @end ifnottex @c ------------------------------------------------------------------- @node Introduction @chapter Introduction @cindex introduction Emms is the Emacs Multi-Media System. Emms organizes playlists, allows browsing through track and album metadata, and plays files by calling external players. This manual tries to be the definitive source of information about Emms, an online version of the manual is available at: @uref{http://www.gnu.org/software/emms/manual/}. The basic functionality of Emms consists of three parts: The core, the sources, and the players. The core resides in @file{emms.el}, provides a simple playlist, and the basic functionality to use all the other features of Emms. It provides the common user commands and interfaces for other parts. It thinks in tracks, where a track is the combination of a type and a name - e.g. the track type 'file has a name that is the file name. Other track types are possible. To get to tracks, the core needs sources. The file @file{emms-source-file.el} provides simple sources to interact with the file system. When Emms finally has the sources in the playlist, it needs a player to play them. @file{emms-player-simple.el} defines a few useful players and provides a straightforward way of providing your own. The Emms comes with many additional features to extend the functionality beyond the core. The way Emms works is easy to customize with your own code or by using `M-x customize' or by changing the variables directly. @c ------------------------------------------------------------------- @node Quickstart Guide @chapter Quickstart Guide This chapter demonstrates how to setup Emms so that you can start listening to your music without having to read all of the documentation first. This is the tl;dr version of the manual. The first thing you do is to load Emms via GNU ELPA. But if you are installing manually, then start by telling Emacs where Emms is located. Let's say you have it in @file{~/elisp/emms/}. So add this line to your @file{.emacs}: @lisp (add-to-list 'load-path "~/elisp/emms/lisp/") @end lisp More detailed information about installing Emms can be found in the installation chapter, @xref{Installation}. You'll then want to load Emms into Emacs. To achieve this you invoke the @code{emms-all} setup function by adding the following three lines to your Emacs initialization file. @lisp (require 'emms-setup) (emms-all) (emms-default-players) @end lisp The function @code{emms-default-players} in the last line sets up the list of default players. The list contains lightweight specialized players like ogg123 or mpg321 and we-play-everything-players such as mplayer, mpv, vlc, etc.. To be sure that emms can play all your music you should check that your preferred players are installed on the machine. More detail about setting up Emms can be found in the setup chapter, @xref{Setup}. Emms tries to display the tags (the name of the song, as opposed to the name of the file) of the music you listen to. Emms can use a number of pieces of software and libraries as sources for track info, see @xref{Track Information} for more. The last thing to do is to tell Emms where is your music; the root directory of our music collection. Let's say all your music is in @file{~/Music} or in subdirectories thereof: @lisp (setq emms-source-file-default-directory "~/Music/") @end lisp OK, now we've set up Emms. Reload your Emacs initialization file or restart Emacs to let the changes have an effect. Now we will add all our music to a playlist by invoking @kbd{M-x emms-add-directory-tree RET ~/Music/ RET}. We do this because then Emms will read the tags of all your music files and caches them (the cache is also required for the Emms browser, @xref{The Browser}.) To switch to the playlist buffer, invoke @kbd{M-x emms-playlist-mode-go} or simply @kbd{M-x emms}. You may see that some tracks are displayed with their file name, but as Emms asynchronously populates its tag cache, track by track, the filenames get replaced with the artist and track name of the file's tag. Go ahead and navigate to a track and hit @kbd{RET} on it to start playback. Now you can start exploring Emms. It's probably best to begin with the basic commands (@pxref{Basic Commands}), the interactive playlists (@pxref{Interactive Playlists}), and the browser (@pxref{The Browser}). @c ------------------------------------------------------------------- @node Installation @chapter Installation @cindex installation Emms is available via GNU ELPA, which takes care of all of the following steps automatically. If you are installing Emms manually, you need to put all the .el files of emms in a directory in your load-path. For example, if you put all those files into ~/elisp/emms/, then in your ~/.emacs, you should add: @lisp (add-to-list 'load-path "~/elisp/emms/lisp/") @end lisp @noindent @menu * Compiling Emms:: Compiling Emms into Byte-Code. @end menu @node Compiling Emms @section Compiling Emms @cindex compiling If you are using XEmacs, you will need to edit @file{Makefile} as follows before continuing. @example EMACS=xemacs SITEFLAG=-no-site-file @end example You can byte-compile Emms by first entering the directory containing the Emms source code, followed by invoking: @command{make} Which will byte compile Emms. You can then invoke: @command{make install} Which will install Emms into your Emacs directories (provided you have the appropriate permissions to do so on your system). Note that Emms is a light-weight and agile program, you can therefore run Emms just fine without byte compiling it. @c ------------------------------------------------------------------- @node Setup @chapter Setup @cindex setup @cindex setting up Emms @cindex quick setup The `emms-setup' feature is provided by the file @file{emms-setup.el}. It is essentially a collection of shortcuts for loading different Emms features quickly, but everything you can do with `emms-setup' can also be done manually. We use `emms-setup' by calling one of the setup functions. @defun emms-minimalistic An Emms setup script. Playlists and all the basics for playing media, but nothing else. @end defun @defun emms-all An Emms setup script. Loads all the stable features which come with the Emms distribution. @end defun `emms-setup' also comes with a convenience function to set a default list of media players. @defun emms-default-players Set @var{emms-player-list} to @var{emms-setup-default-player-list}. @end defun You can of course write your own Emms setup functions like the above by looking at the existing function definitions in @file{emms-setup.el}. @c ------------------------------------------------------------------- @node Configuration @chapter Configuration @cindex Configuration This chapter discusses the configuration of Emms in more detail. The following code fragment provides a minimal Emms setup without using the layer of `emms-setup'. It can maybe be used to better understand the internals of Emms. You can see how Emms needs to know about players (these are defined in `emms-player-simple') and about sources for tracks (trivial file system based sources, such as this `emms-directory-tree', are defined in `emms-source-file'). @lisp (require 'emms-player-simple) (require 'emms-source-file) (require 'emms-source-playlist) (setq emms-player-list '(emms-player-mpg321 emms-player-ogg123 emms-player-mplayer)) @end lisp For a discussion on how to define additional players, see @xref{Simple Players}. Much of the behaviour of Emms can be changed by setting variables. For example: @lisp (setq emms-info-asynchronously nil) (setq emms-playlist-buffer-name "*Music*") @end lisp The first @code{setq} turns off the asynchronous updating of info tags. The second sets the default name of the Emms playlist buffer. Another way to change Emms variables is to use the M-x @command{customize} mechanism provided by Emacs. @menu * Finding files and speed:: Finding files quickly or portably. * Setup Examples:: Examples of ways to setup Emms. @end menu @node Finding files and speed @section Finding files and speed @cindex files @cindex speed Emms needs to traverse directories in order to find playable media. The default method Emms uses to achive this is @code{emms-source-file-directory-tree-internal} as defined in @file{emms-source-file.el}. The above method is written portably and will always work, but might be too slow if we want to load several hundred tracks (or more). @file{emms-source-file.el} defines another method for finding files, @code{emms-source-file-directory-tree-find} which uses GNU/find. @code{emms-source-file-directory-tree-find} is usually an order of magnitude faster, but of course will not work if you do not have GNU/find installed. The method Emms will use is defined in the customisable variable @var{emms-source-file-directory-tree-function}. @node Setup Examples @section Setup Examples @cindex example @cindex configuration What follow are samples from real-world Emms configurations which show some of the variety and breadth of modifications people make to the default Emms setup. The following excerpt includes dbus integration, defining a "recent" filter for the @xref{The Browser}, persistent playlist via @file{emms-history.el}, and enabling sending track information with @file{emms-librefm-stream.el}: @lisp ;; notifications (require 'emms-dbus) (emms-dbus-enable) ;; covers (setq emms-browser-covers #'emms-browser-cache-thumbnail-async) (setq emms-browser-thumbnail-small-size 64) (setq emms-browser-thumbnail-medium-size 128) ;; filters (emms-browser-make-filter "all" #'ignore) (emms-browser-make-filter "recent" (lambda (track) (< 30 (time-to-number-of-days (time-subtract (current-time) (emms-info-track-file-mtime track)))))) (emms-browser-set-filter (assoc "all" emms-browser-filters)) ;; history (emms-history-load) ;; libre-fm (emms-librefm-scrobbler-enable) @end lisp In the following it is possible to see how some of defaults are set regarding saving playlists, playlist interaction, as well as adding special arguments to a specific player backend. @lisp (setq-default emms-source-file-default-directory "/mnt/db/mediaCore/sound_music/" emms-source-playlist-default-format 'm3u emms-playlist-mode-center-when-go t emms-playlist-default-major-mode 'emms-playlist-mode emms-show-format "NP: %s" emms-player-list '(emms-player-mpv) emms-player-mpv-environment '("PULSE_PROP_media.role=music") emms-player-mpv-parameters '("--quiet" "--really-quiet" "--no-audio-display" "--force-window=no" "--vo=null")) @end lisp @c ------------------------------------------------------------------- @node Getting Help @chapter Getting Help @cindex mailing list @cindex website If you have a bug to report, need help, or wish to suggest a feature, please feel free to use the Emms mailing list. The address of the list is emms-help@@gnu.org. To subscribe to it, visit @url{http://lists.gnu.org/mailman/listinfo/emms-help}. If you are familiar with the Gmane service, there is a Gmane newsgroup which mirrors this mailing address at gmane.emacs.emms.user. Emms also has a website at @url{http://www.gnu.org/software/emms/}. @c ------------------------------------------------------------------- @node Formats and Freedom @chapter Formats and Freedom @cindex freedom @cindex format Emms is free software, but some of the file formats it can play carry restrictions, they are proprietary file formats. Proprietary software companies are pushing out audio and video formats which restrict when, where and how you can play them, and restrict developers from writing free software which interacts with them. Restrictive file formats put the corporate bottom-line before the public interest. Fortunately there are alternatives like Ogg. Ogg is a professional grade multimedia format. Ogg Vorbis is the compressed audio format (like MP3), and Ogg Theora is the video format. For more information, go to @url{http://www.xiph.org/}. If you want to transcode audio into a lossless format, you can try FLAC (Free Lossless Audio Codec). FLAC stands out as the fastest and most widely supported lossless audio codec, and the only one that at once is non-proprietary, is unencumbered by patents and has the source code for a reference implementation freely available. For more information about FLAC, go to @url{http://flac.sourceforge.net/}. @c ------------------------------------------------------------------- @node Basic Commands @chapter Basic Commands @cindex basic commands @cindex commands, basic Before you can use the interface commands, you need a playlist to start with. The following commands allow you to add to the current playlist from different sources: Note that the commands with the ``emms-add-'' prefix add the source to the playlist but do not start playing it immediately. Conversely, the commands with the ``emms-play-'' prefix begin playing the track immediately. @defun emms-play-file file A source for a single file - either @var{file}, or queried from the user. If called with a prefix the file will be added like @command{emms-add-file}. @end defun @defun emms-add-file file A source for a single file - either @var{file}, or queried from the user. If called with a prefix the file will be played like @command{emms-play-file}. @end defun @defun emms-play-directory dir A source for a whole directory tree - either @var{dir}, or queried from the user. @end defun @defun emms-add-directory dir A source for a whole directory tree - either @var{dir}, or queried from the user. @end defun @defun emms-play-directory-tree dir A source for multiple directory trees - either @var{dir}, or the value of @var{emms-source-file-default-directory}. @end defun @defun emms-add-directory-tree dir A source for multiple directory trees - either @var{dir}, or the value of @var{emms-source-file-default-directory}. @end defun @defun emms-play-url url A source for an @var{url} - for example, for streaming over http, playing over sftp, or playing local files (with the ``file://'' scheme). @end defun @defun emms-add-url url A source for an @var{url} - for example, for streaming over http, playing over sftp, or playing local files (with the ``file://'' scheme). @end defun @defun emms-play-playlist playlist A source for the M3u or PLS playlist format from the file @var{playlist}. @end defun @defun emms-add-playlist playlist A source for the M3u or PLS playlist format from the file @var{playlist}. @end defun @defun emms-play-find dir regexp A source that will find files in @var{dir} or @var{emms-source-file-default-directory} which match @var{regexp}. @end defun @defun emms-add-find dir regexp A source that will find files in @var{dir} or @var{emms-source-file-default-directory} which match @var{regexp}. @end defun The basic functionality of Emms is just to play music without being noticed. It provides a few commands to skip the current track and such, but other than that it doesn't show up. Emms provides the following basic user commands (which you might want to bind to keystrokes): @defun emms-start Start playing the current playlist @end defun @defun emms-stop Stop playing @end defun @defun emms-next Start playing the next track in the playlist @end defun @defun emms-previous Start playing previous track in the playlist @end defun @defun emms-shuffle Shuffle the current playlist. This uses @var{emms-playlist-shuffle-function}. @end defun @defun emms-sort Sort the current playlist. This uses @var{emms-playlist-sort-function}. @end defun @defun emms-show &optional insertp Describe the current Emms track in the minibuffer. If @var{insertp} is non-nil, insert the description into the current buffer instead. This function uses @var{emms-show-format} to format the current track. @end defun The command @command{emms-show-all} will pop up a window with the complete information about the track being played. @command{emms-show-all} is provided by @file{emms-show-all.el}, which is included in the `emms-all' setup level. See @xref{Setup}. @c ------------------------------------------------------------------- @node The Core File @chapter The Core File @cindex core file @cindex heart of Emms @cindex primitive functions The core file @file{emms.el} provides the all basic functions for playing music, generating playlists and defining players. @menu * User Variables:: Variables for the user to tweak. * Hooks:: Hooks for important Emms functions. * Core Functions:: Providing the basic functionality of Emms. @end menu @node User Variables @section User Variables @cindex user variables @cindex options The core file defines a number of user variables. @defopt emms-player-list A list of players Emms can use. You need to set this in order to use Emms to play media. @end defopt @defopt emms-show-format The format to use for @command{emms-show}. Any "%s" is replaced by what @var{emms-track-description-function} returns for the currently playing track. @end defopt @defopt emms-repeat-playlist Non-nil if the Emms playlist should automatically repeat the playlist. If nil, playback will stop when the last track finishes playing. @end defopt @defopt emms-track-description-function Function for describing an Emms track in a user-friendly way. @end defopt @defopt emms-sort-lessp-function A function that compares two tracks, and returns non-nil if the first track should be sorted before the second (see also @code{sort}). @end defopt @node Hooks @section Hooks @cindex hooks @cindex adding functionality The core file provides hook variables for the basic functionality of Emms. @defopt emms-player-started-hook A hook run when an Emms player started playing. @end defopt @defopt emms-player-stopped-hook A hook run when an Emms player stopped playing. See also @var{emms-player-finished-hook}. @end defopt @defopt emms-playlist-source-inserted-hook Hook run when a source got inserted into the playlist. The buffer is narrowed to the new tracks. @end defopt @defopt emms-playlist-selection-changed-hook Hook run after another track is selected in the Emms playlist. @end defopt @defopt emms-playlist-cleared-hook Hook run after the current Emms playlist is cleared. This happens both when the playlist is cleared and when a new buffer is created for it. @end defopt @defopt emms-player-finished-hook Hook run when an Emms player finishes playing a track. Please pay attention to the differences between @var{emms-player-finished-hook} and @var{emms-player-stopped-hook}. The former is called only when the player is stopped interactively; the latter, only when the player actually finishes playing a track. @end defopt @defopt emms-player-paused-hook Hook run when a player is paused or resumed. Use @var{emms-player-paused-p} to find the current state. @end defopt @node Core Functions @section Core Functions @cindex core functions @cindex basic functions The core file also defines all the functions important to the basic use of Emms. There are functions which deal with movement in the playlist. @defun emms-next-noerror Start playing the next track in the Emms playlist. Unlike @code{emms-next}, this function doesn't signal an error when called at the end of the playlist. This function should only be called when no player is playing. This is a good function to put in @code{emms-player-finished-hook}. @end defun @defun emms-playlist-next Move to the previous track in the current buffer. @end defun @defun emms-playlist-previous Move to the previous track in the current buffer. @end defun @defun emms-random Jump to a random track. @end defun @defun emms-toggle-repeat-playlist Toggle whether emms repeats the playlist after it is done. See @var{emms-repeat-playlist}. @end defun @defun emms-toggle-repeat-track Toggle whether emms repeats the current track. See @var{emms-repeat-track}. @end defun @defun emms-toggle-random-playlist Toggle whether emms plays the tracks randomly or sequentially. See @end defun @var{emms-random-playlist}. Some functions deal with the getting and setting track information. @defun emms-track type name Create a track with type @var{type} and name @var{name}. @end defun @defun emms-track-type track Return the type of @var{track}. @end defun @defun emms-track-name track Return the name of @var{track}. @end defun @defun emms-track-get name track &optional inexistent Return the value of @var{name} for @var{track}. If there is no value, return @var{default} (or nil, if not given). @end defun @defun emms-track-set track name value Set the value of @var{name} for @var{track} to @var{value}. @end defun @defun emms-track-description track Return a description of @var{track}. This function uses @var{emms-track-description-function}. @end defun @defun emms-player-for track Return an Emms player capable of playing @var{track}. This will be the first player whose PLAYABLEP function returns non-nil, or nil if no such player exists. @end defun @defun emms-playlist-current-selected-track Return the currently selected track in the current playlist. @end defun There are also functions which deal with the playing itself. @defun emms-player-start track Start playing @var{track}. @end defun @defun emms-player-stop Stop the currently playing player. @end defun @defun emms-player-stopped Declare that the current Emms player is finished. This should only be done by the current player itself. @end defun @defun emms-seek seconds Seek the current player @var{seconds} seconds. This can be a floating point number for sub-second fractions. It can also be negative to seek backwards. @end defun @defun emms-seek-forward Seek ten seconds forward. @end defun @defun emms-seek-backward Seek ten seconds backward. @end defun For more basic commands defined in the core file see @xref{Basic Commands}. @c ------------------------------------------------------------------- @node Sources @chapter Sources @cindex Sources Sources allow Emms to add and play tracks. Emms comes with a number of sources of its own. Sources are designed so that creating new ones will be easy. For examples of Emms sources for files and directories see @file{emms-source-file.el}. @defopt emms-source-file-default-directory The default directory to look for media files. @end defopt @defun emms-play-find Play all files in @var{emms-source-file-default-directory} that match a specific regular expression. @end defun @defun emms-source-file &optional file An Emms source for a single file - either @var{file}, or queried from the user. @end defun @defun emms-source-files files An Emms source for a list of @var{files}. @end defun @defun emms-source-directory &optional dir An Emms source for a whole directory tree - either @var{dir}, or queried from the user @end defun @defun emms-source-directory-tree & optional dir An Emms source for multiple directory trees - either @var{dir}, or the value of @var{emms-source-file-default-directory}. @end defun @defun emms-source-playlist file An Emms source for playlists. See @var{emms-source-playlist-formats} for a list of supported formats. @end defun @defun emms-source-playlist-native file An Emms source for a native Emms playlist file. @end defun @defun emms-source-playlist-m3u file An Emms source for an m3u playlist file. @end defun @defun emms-source-playlist-pls file An Emms source for a pls playlist file. @end defun @defun emms-source-find &optional dir regex An Emms source that will find files in @var{dir} or @var{emms-source-file-default-directory} that match @var{regexp}. @end defun @defun emms-source-file-directory-tree &optional dir Return a list of all files under @var{dir} which match @var{regex}. @end defun @defun emms-source-dired Play all marked files of a dired buffer @end defun @defun emms-source-file-regex Return a regexp that matches everything any player (that supports files) can play. @end defun @defun emms-locate regexp Search for @var{regexp} and display the results in a locate buffer @end defun @c ------------------------------------------------------------------- @node Simple Players @chapter Simple Players @cindex players, simple @defmac define-emms-simple-player name types regex command &rest args Define a simple player. @var{name} is used to construct the name of the function like emms-player-@var{name}. @var{types} is a list of track types understood by this player. @var{regex} must be a regexp that matches the filenames the player can play. @var{command} specifies the command line argument to call the player and @var{args} are the command line arguments. @end defmac For a discussion on how to define new players see @xref{New Player}. @defun emms-player-simple-stop Stop the currently playing process, if indeed there is one. @end defun @defun emms-player-simple-start filename cmdname params Starts a process playing @var{filename} using the specified @var{cmdname} with the specified @var{params}. @end defun @defun emms-player-simple-sentinel proc str Sentinel for determining the end of process for the process @var{proc} and the sentinel string @var{str}. @end defun @c ------------------------------------------------------------------- @node Playlists @chapter Playlists @cindex organizing tracks and media Emms uses Emacs buffers to store the media tracks for playing. We call one such buffer a ``playlist buffer'' or an ``Emms playlist buffer''. Emms then proceeds to play the media tracks in the buffer from top to bottom until the end of the playlist. The name of the playlist buffer is defined in the variable @var{emms-playlist-buffer-name} and is set to be an invisible Emacs buffer by default. You can change to any name you want. For an example configuration see @xref{Configuration}. You can create any number of playlist buffers you wish. At any time Emms has a single ``current'' buffer through which it proceeds track by track. @defun emms-playlist-new &optional name Create a new playlist buffer. The buffer is named @var{name}, but made unique. @var{name} defaults to `emms-playlist-buffer-name'. If called interactively, the new buffer is also selected. @end defun @defun emms-playlist-save &optional format file Store the current playlist to FILE as the type FORMAT. The default format is specified by @var{emms-source-playlist-default-format}. @end defun The current Emms playlist buffer is stored in the variable @var{emms-playlist-buffer}. @c ------------------------------------------------------------------- @node Track Information @chapter Track Information @cindex track information @cindex info tags By default Emms will only list tracks as file names or URLs in playlists (@pxref{Playlists}) and the browser (@pxref{The Browser}). However, Emms can be configured to utilize so-called @dfn{info methods} to augment tracks with metadata information, such as artist name, track name, album title, and the like. We describe these methods and their use in this chapter. Fundamentally, info methods are Emacs Lisp functions that are called for each track to provide information for that track. Current info methods in Emms are restricted to tracks that are files; they do not work with stream URLs (@pxref{Streaming Audio}). Some of the methods require installation of some additional software that Emms can then call to read metadata from disk (@pxref{Metadata Utilities}). Finally, some methods work only with a limited set of media file formats such as Ogg or MP3, while some methods support a wide variety of formats. If caching is enabled (it is by default) then the metadata for each track will be stored in the cache for faster retrieval. That means if you change info method and want updated tracks, you will have to reset the cache @kbd{M-x emms-cache-reset} and then repopulate with @kbd{M-x emms-add-directory-tree RET ~/Music/ RET} or similar. Automatic track information retrieval is enabled by default in the @code{emms-all} setup level (@pxref{Setup}). That setup level configures Emms to use @code{emms-info-native} and @code{emms-info-cueinfo} methods, as they are the only methods that do not rely on additional software. Here is a list of all info methods distributed with Emms and their software requirements: @table @code @item emms-info-native This method is implemented completely in Emacs Lisp and hence does not require any external software. It supports Ogg Vorbis, Opus, FLAC and MP3 files. @item emms-info-tinytag This method utilizes a small Python library @code{tinytag}. It supports MP3, Ogg Vorbis, Opus, MP4, M4A, FLAC, WMA and WAV formats. @item emms-info-exiftool This method calls @command{exiftool} utility written in Perl. It supports dozens of media file formats, far too many to list here. @item emms-info-libtag This method calls a small ``shim'' executable @command{emms-print-metadata} built around TagLib library. It supports MP3, Ogg Vorbis, Opus, FLAC, MPC, Speex, WavPack, TrueAudio, WAV, AIFF, MP4 and ASF formats. @item emms-info-metaflac This method calls @command{metaflac} utility. It works only with FLAC files. @item emms-info-mp3info This method calls @command{mp3info} utility. It works only with MP3 files that have older id3v1 tags. @item emms-info-ogginfo This method calls @command{ogginfo} utility. It supports Ogg Vorbis and Theora formats. @item emms-info-opusinfo This method calls @command{opusinfo} utility. It works only with Opus files. @item emms-info-cueinfo This is a special method that parses track information from an accompanying cue file for FLAC and APE files (@pxref{APE / FLAC Commands}). It does not require any additional software. @end table To use any of the methods, add the method to @code{emms-info-functions} list. For example: @lisp (require 'emms-info-native) (add-to-list 'emms-info-functions 'emms-info-native) @end lisp @noindent You can also use a combination of format-specific tools if needed: @lisp (require 'emms-info-mp3info) (require 'emms-info-ogginfo) (add-to-list 'emms-info-functions 'emms-info-mp3info 'emms-info-ogginfo) @end lisp @noindent In this case both @code{emms-info-mp3info} and @code{emms-info-ogginfo} will be called for each track. There are a number of user variables which control the behavior of @code{emms-info}: @defopt emms-info-auto-update Non-nil when Emms should update track information if the file changes. This will cause hard drive activity on track loading. If this is too annoying for you, set this variable to nil. @end defopt @defopt emms-info-asynchronously Non-nil when track information should be loaded asynchronously. This requires the feature @code{later-do} which is provided by the file @file{later-do.el}, which comes with Emms. See variable @code{emms-later-do-batch} for performance tweaking. @end defopt @defopt emms-info-functions A list of functions (info methods) which add information to tracks. Each function is called with a track as argument. If two info methods produce the same information (for example album name), the latter one takes precedence. @end defopt @menu * Metadata Utilities:: Supported external metadata utilities. * Defining Info Methods:: How to define new info methods. @end menu @node Metadata Utilities @section Metadata Utilities With the exception of @code{emms-info-native} and @code{emms-info-cueinfo}, Emms info methods require external metadata utilities to read metadata from media files. If you plan to use a certain info method, make sure you have the corresponding utility installed. All of these utilities are free software, and most of them are included in free GNU/Linux distributions. @subsubheading tinytag tinytag is a Python library for reading metadata from music files. It is available at @url{https://pypi.org/project/tinytag/}. Naturally a working Python interpreter is also required. The corresponding Emms info method is @code{emms-info-tinytag}. It is best to configure @code{emms-info-tinytag} as the sole info method for Emms, because competing and overlapping methods can cause confusion. To use it, add the following into your Emacs initialization file: @lisp (require 'emms-info-tinytag) (setq emms-info-functions '(emms-info-tinytag)) @end lisp @subsubheading ExifTool ExifTool is a platform-independent Perl library and a command-line application for reading, writing and editing meta information in a wide variety of files. It is available at @uref{https://exiftool.org/}. Naturally a working Perl interpreter is also required. The corresponding Emms info method is @code{emms-info-exiftool}. It is best to configure @code{emms-info-exiftool} as the sole info method for Emms, because competing and overlapping methods can cause confusion. To use it, add the following into your Emacs initialization file: @lisp (require 'emms-info-exiftool) (setq emms-info-functions '(emms-info-exiftool)) @end lisp @subsubheading TagLib TagLib is a library for reading and editing metadata of several popular audio formats. It is available at @url{http://taglib.github.io/}. Because TagLib is a C++ library instead of an executable program, you have to build and install a small ``shim'' executable @command{emms-print-metadata} around it. @code{emms-info-libtag} will then call this executable to read metadata from media files. To compile @command{emms-print-metadata} invoke @command{make emms-print-metadata} @noindent in Emms directory. For this to succeed you need to have a working C++ compiler and TagLib development libraries installed on your system. The resultant binary executable will be installed when you invoke @command{make install} as in @xref{Compiling Emms}. @noindent It is of course also possible to install only the @file{emms-print-metadata} binary where your system can find and execute it without installing all of Emms via the make command. Once @command{emms-print-metadata} is available, it is best to configure @code{emms-info-libtag} as the sole info method for Emms, because competing and overlapping methods can cause confusion. To use it, add the following into your Emacs initialization file: @lisp (require 'emms-info-libtag) (setq emms-info-functions '(emms-info-libtag)) @end lisp @subsubheading metaflac @command{metaflac} is the command-line FLAC file metadata editor. It is included in FLAC source distribution available at @url{https://github.com/xiph/flac}. The corresponding info method is @code{emms-info-metaflac}. To use it, add the following into your Emacs initialization file: @lisp (require 'emms-info-metaflac) (add-to-list 'emms-info-functions 'emms-info-libtag) @end lisp @subsubheading MP3info MP3info is a small utility for reading and modifying id3v1 tags from MP3 files. Note that more recent id3v2 tags are not supported; for those you need to use another info method, for example @code{emms-info-native}. MP3info is available at @url{https://ibiblio.org/mp3info/}. The corresponding info method is @code{emms-info-mp3info}. To use it, add the following into your Emacs initialization file: @lisp (require 'emms-info-mp3info) (add-to-list 'emms-info-functions 'emms-info-mp3info) @end lisp @subsubheading ogginfo @command{ogginfo} is a small utility for extracting information about Ogg Vorbis and Theora files. It is part of Vorbis Tools source distribution available at @url{https://github.com/xiph/vorbis-tools}. The corresponding info method is @code{emms-info-ogginfo}. To use it, add the following into your Emacs initialization file: @lisp (require 'emms-info-ogginfo) (add-to-list 'emms-info-functions 'emms-info-ogginfo) @end lisp @subsubheading opusinfo @command{opusinfo} is a small utility for extracting information about Opus files. It is part of Opus Tools source distribution available at @url{https://github.com/xiph/opus-tools}. The corresponding info method is @code{emms-info-opusinfo}. To use it, add the following into your Emacs initialization file: @lisp (require 'emms-info-opusinfo) (add-to-list 'emms-info-functions 'emms-info-opusinfo) @end lisp @node Defining Info Methods @section Defining Info Methods @cindex defining info methods An info method essentially consists of a function which, given an Emms track, sets the appropriate @dfn{info-symbols} for that track. Info symbols are keys that have an associated value stored in the @dfn{metadata cache}. While info symbols can have arbitrary names, the following symbols are recognized by Emms: @table @code @item info-album Album title. @item info-albumsort Album title for collation. @item info-artist Artist name. @item info-artistsort Artist name for collation. @item info-albumartist Album artist name. @item info-albumartistsort Album artist name for collation. @item info-composer Composer name. @item info-composersort Composer name for collation. @item info-date Release date. @item info-originaldate Original release date. @item info-performer Performer name. @item info-title Track title. @item info-titlesort Track title for collation. @item info-tracknumber Track number. @item info-discnumber Disc number. @item info-year Release year. @item info-originalyear Original release year. @item info-note Free-form note. @item info-genre Genre. @item info-label Record label. @item info-playing-time Playing time in seconds. @end table @noindent An info method does not need to add all of these symbols into the given track. It can also add other symbols, but those extra symbols won't be used by Emms. We can for example look at the predefined method for retrieving information about audio tracks in the Ogg format. The function @code{emms-info-ogginfo} provided by @file{emms-info-ogginfo.el} accepts an Emms track @var{track} as a single argument. It uses @command{ogginfo} utility to extract a list of key-value metadata pairs from the file represented by @var{track}. Next, it sets the appropriate info symbols for @var{track} by calling @code{emms-track-set}. Info symbols are interned from the extracted keys. Those keys can be arbitrary strings, but they typically coincide with the keys listed above; for example ``album'' and ``artist'' form info symbols @code{info-album} and @code{info-artist}. @c ------------------------------------------------------------------- @node Interactive Playlists @chapter Interactive Playlists @cindex Interactive Playlists Emms provides a visual, interactive playlist mode as well as the ability to use playlists without ever looking at then. This visual, interactive mode is called the `emms-playlist-mode' and is defined in @file{emms-playlist-mode.el}. The interactive playlist mode is enabled by default in the `emms-all' setup level. For more information about Emms setup levels see @xref{Setup}. @defun emms-playlist-mode-go Switch to the current emms-playlist buffer and use emms-playlist-mode. @end defun If you wish to make this the default Emms playlist mode, add the following to your @file{.emacs}. @lisp (setq emms-playlist-default-major-mode 'emms-playlist-mode) @end lisp The interactive playlist buffer shows the tracks in the current Emms playlist in the order in which they will be played. The current track will be highlighted. When in the interactive playlist mode we can perform different actions on the current playlist. @table @kbd @item a @findex emms-playlist-mode-add-contents Add files in the playlist at point to the current playlist buffer. If we are in the current playlist, make a new playlist buffer and set it as current. @item b @findex emms-playlist-set-playlist-buffer Set the current playlist buffer. @item n @findex emms-next Start playing the next track in the playlist. @item p @findex emms-next Start playing the previous track in the playlist. @item s @findex emms-stop Stop playing. @item P @findex emms-pause Pause. @item > @findex emms-seek-forward Seek ten seconds forward. @item < @findex emms-seek-backward Seek ten seconds backward. @item f @findex emms-show Describe the currently playing track in the minibuffer. @item c @findex emms-playlist-mode-center-current Display the current track in the center of the screen. @item RET @findex emms-playlist-mode-play-current-track Start playing the track under point. Note that this is also available with @kbd{}. @item SPC @findex scroll-up Scroll up a near full page. @item M-< @findex emms-playlist-mode-first Go to the first track in the playlist. @item M-> @findex emms-playlist-mode-last Go to the last track in the playlist. @item r @findex emms-random Go to a randomly selected track in the playlist. @item q @findex bury-buffer Put the interactive playlist buffer at the end of the list of all buffers. @item C-x C-s @findex emms-playlist-save Save the current playlist buffer to a file. By default, Emms will ask you for confirmation before overwriting an existing playlist. You can silently overwrite existing playlist by setting @var{emms-source-playlist-ask-before-overwrite} to nil. @item ? @findex describe-mode Describe the mode. @end table We can also edit the playlist using familiar GNU/Emacs commands: @table @kbd @item C-k @findex emms-playlist-mode-kill-track Remove the track under point from the playlist buffer. Also available using the @kbd{d} key. @item C-y @findex emms-playlist-mode-yank See the command @command{yank} @item C-w @findex emms-playlist-mode-kill See the command @command{kill-region} @item M-y @findex emms-playlist-mode-yank-pop See the command @command{yank-pop}. @item C-j @findex emms-playlist-mode-insert-newline Insert a newline at point. @end table We can use the regular GNU/Emacs killing and yanking commands to move and copy tracks in between playlist buffers. We can use the same commands to insert arbitrary text into the playlist buffers together with the playlist tracks. Text which is not a track is ignored by the program and can therefore be used to include titles and annotations within the playlist. @c ------------------------------------------------------------------- @node Markable Playlists @chapter Markable Playlists @cindex Markable Playlists The Markable Playlists provided by the file @file{emms-mark.el} are an alternative to the default interactive playlists, @xref{Interactive Playlists}. They allow marking tracks with keybindings familiar to users of dired. To enable the Markable Playlists you have to add @lisp (require 'emms-mark) @end lisp to your @file{.emacs}. Then you can activate @command{emms-mark-mode} by executing @command{M-x emms-mark-mode} in a playlist buffer. You can return to the default interactive playlist mode with @command{M-x emms-mark-mode-disable}. If you wish to make this the default Emms playlist mode, add the following to your @file{.emacs}. @lisp (setq emms-playlist-default-major-mode 'emms-mark-mode) @end lisp @table @kbd @item m @findex emms-mark-forward Marks the current track and sets point one line forward. If a prefix argument ARG is given, it will mark the next ARG tracks and set point accordingly. A negative argument marks backward. @item U @findex emms-mark-unmark-all Unmarks all tracks in the playlist. @item t @findex emms-mark-toggle Toggles mark on the current track. @item u @findex emms-mark-unmark-forward Unmarks same way as @command{emms-mark-forward} marks. @item % m @findex emms-mark-regexp Marks all tracks in the playlist matching the given regular expression. A prefix argument means to unmark them instead. @end table When tracks are marked you can operate on them: @table @kbd @item D @findex emms-mark-delete-marked-tracks Deletes the marked tracks from the playlist. @item K @findex emms-mark-kill-marked-tracks Deletes the marked tracks from the playlist and places them in the kill-ring, so that you can @command{yank} in into another playlist. @item W @findex emms-mark-copy-marked-tracks Adds the marked tracks to the kill-ring, so that you can @command{yank} them into another playlist. @end table emms-mark is also intent to provide a way for user to select tracks for other command to operate on them. Currently, @file{emms-tag-editor.el} uses the emms-mark to edit the tags of selected tracks. Two functions are useful for the elisp programer to handle marked tracks. @defun emms-mark-do-with-marked-track This function take a function to perform on all marked tracks. A optional argument `move-flag' to tell the function to move forward line after calling given function. If the given function didn't change position, the second argument should set to non-nil. @end defun @defun emms-mark-mapcar-marked-track This function is very similar to `emms-mark-do-with-marked-track' except it collects result of given function (that's why named with `mapcar'). @end defun @c ------------------------------------------------------------------- @node Extending Emms @chapter Extending Emms @cindex new players @cindex defining players @cindex new players, defining Emms introduces a high abstraction layer for playing music so you can customise it to your needs. @menu * New Player:: How to define a new player. * Simple Player for `play':: An example player using @command{play}. * More Complex Player:: Example of a complex player using @command{mpg321}. @end menu @node New Player @section New Player @cindex new player @cindex defining new players The file @file{emms-player-simple.el} defines some easy players to start with, but it shouldn't be hard to provide a function for your favourite player. We will start with an easy example that shows how we can use the @command{play} command under Unix to play our WAV files. @node Simple Player for `play' @section Simple Player for `play' @cindex simple player @cindex primitive player @cindex basic player Play is a very easy command line player for various format. If you want your emms to play WAV files just put the following lines in you @file{.emacs}: @lisp (require 'emms-player-simple) (define-emms-simple-player play '(file) "\\.wav$" "play") @end lisp @noindent Huh! Wasn't that easy? The macro function @command{define-emms-simple-player} takes a minimum of three arguments. The first argument (@emph{play} in our example) defines the name of the player. It's used to name the player functions. The second is a regexp, that defines which files to play with our player. @emph{\\.wav$} matches any filename ending with a dot and the string wav. The last argument is the actual command line command we use to play our files. You can also add the path but we just assume that the command is in your path. All arguments you add to these three are optional. They define the command line arguments you want to add to your argument. If you want to hear the wav file of your favourite artist in the most possible volume use the following line: @lisp (require 'emms-player-simple) (define-emms-simple-player play '(file) "\\artist-*.wav$" "play" "--volume=100") @end lisp @noindent Please notice that you have to add the arguments as strings! The command line tool you use for @command{define-emms-simple-player} has to take one song as argument and stop after playing that particular song. For any other concept you will need to customise emms a bit more... @node More Complex Player @section More Complex Player @cindex complex player @cindex advanced player The most players you use will be simple players so you don't need to read this chapter. But if you are curious how you can use (almost) every player in emms read further... In this chapter we will use mpg321 to construct a player that actually can pause a track, restart it and show rest time. We won't implement all of that, but after that chapter you will know how to define it. The command @command{define-emms-simple-player} is just a abstraction layer for @command{define-emms-player}, which is a little bit more complicated but much more powerful! @lisp (define-emms-player "emms-mpg321-remote" :start 'emms-mpg321-remote-start :stop 'emms-mpg321-remote-stop :playablep 'emms-mpg321-remote-playable-p) @end lisp @noindent So, that is almost all! @command{define-emms-player} takes a minimum of three arguments. The first is the name of the player. The rest are methods with functions to call. Three methods are required: start, stop and playable. Start says Emms how to start a track (sic!), stop how to stop a player and playablep should return non-nil if the player can play the track. So we just need these three functions to get our mpg321-remote: First we code the start function. We will check if there's a open process and start one otherwise. Then we send a string to the process with the filename and set a filter. @lisp (defun emms-mpg321-remote-start () (unless (get-process ``mpg321-remote'') (setq emms-mpg321-remote-process (start-process "mpg321-remote-process" "*mpg321*" "mpg321" "-R" "abc")) (process-send-string "mpg321-remote-process" (concat "l " (emms-track-name track))) (set-process-filter emms-mpg321-remote-process 'emms-mpg321-remote-filter))) @end lisp @noindent We need the filter, as mpg321-remote won't quit after playing the track as the simple player do. We wait until the process sends the output ``(at-sign)P 0'' (the signal of mpg321 that the song ended) to the filter and call emms-mpg321-remote-stop. @lisp (defun emms-mpg321-remote-filter (process output) (when (string-match "(at-sign)P 0" output) (emms-mpg321-remote-stop))) @end lisp @noindent @command{emms-mpg321-remote-stop} won't do anything interesting. It just test if there are other files to play and close the process otherwise. @lisp (defun emms-mpg321-remote-stop () (unless emms-playlist (process-send-string "mpg321-remote-process" "Q\n")) @end lisp @noindent And to make that a playable example I also added @command{emms-mpg321-remote-playablep}, which I really just steal from @file{emms-player-simple.el} @lisp (defun emms-mpg321-remote-playablep (track) "Return non-nil when we can play this track." (and (emms-track-file-p track) @end lisp @noindent Now we have a ready player and we could add commands like @command{emms-mpg321-remote-pause} for example. @c ------------------------------------------------------------------- @node The Browser @chapter The Browser The Browser allows you to browse the metadata cache and add tracks to your playlist. It includes a powerful interactive mode. The Browser is defined in @file{emms-browser.el} and is included in the @command{emms-all} setup level. For more information about Emms setup levels see @xref{Setup}. You can also manually add the Browser to your Emms setup by loading it explicitly with: @lisp (require 'emms-browser) @end lisp To be properly useful, you should do M-x @command{emms-add-directory-tree} to all the files you own at least once so that the cache is fully populated. @menu * Browser Interface:: The interactive browser interface. * Filtering Tracks:: Displaying a subset of the tracks. * Displaying Covers:: Displaying album covers in the browser interface. * Changing Looks:: Changing the tree structure, display format and faces. @end menu @node Browser Interface @section Browser Interface The browser interface allows you to display and interact with your tracks in many different ways. There are a number of ways to start the browser. @defun emms-smart-browse Display browser and playlist. Toggle between selecting browser, playlist or hiding both. Tries to behave sanely if the user has manually changed the window configuration. @end defun @defun emms-browse-by-artist Display the browser and order the tracks by artist. @end defun @defun emms-browse-by-album Display the browser and order the tracks by album. @end defun @defun emms-browse-by-genre Display the browser and order the tracks by genre. @end defun @defun emms-browse-by-year Display the browser and order the tracks by year. @end defun Once the Browser is displayed you can use it to managed your track collection and playlists. The Browser is interactive and has its own keybindings. @table @kbd @item C-j @kindex C-j (emms-browser) @findex emms-browser-add-tracks-and-play Add all tracks at point, and play the first added track. @item RET @kindex RET (emms-browser) @findex emms-browser-add-tracks Add all tracks at point. @item SPC @kindex SPC (emms-browser) @findex emms-browser-toggle-subitems Show or hide (kill) subitems under the current line. @item 1 @kindex 1 (emms-browser) @findex emms-browser-collapse-all Collapse everything. @item 2 @kindex 2 (emms-browser) @findex emms-browser-expand-to-level-2 Expand all top level items one level. @item 3 @kindex 3 (emms-browser) @findex emms-browser-expand-to-level-3 Expand all top level items two levels. @item 4 @kindex 4 (emms-browser) @findex emms-browser-expand-to-level-4 Expand all top level items three levels. @item C @kindex C (emms-browser) @findex emms-browser-clear-playlist Clear the playlist. @item E @kindex E (emms-browser) @findex emms-browser-expand-all Expand everything. @item d @kindex d (emms-browser) @findex emms-browser-view-in-dired View the current directory in dired. @item q @kindex q (emms-browser) @findex emms-browser-bury-buffer Bury the browser buffer. @item r @kindex r (emms-browser) @findex emms-browser-goto-random Jump to a random track. @item / @kindex / (emms-browser) @findex emms-isearch-buffer Isearch through the buffer. @item < @kindex < (emms-browser) @findex emms-browser-previous-filter Redisplay with the previous filter. @item > @kindex > (emms-browser) @findex emms-browser-next-filter Redisplay with the next filter. @item ? @kindex ? (emms-browser) @findex describe-mode See the Emacs documentation for the function. @item C-/ @kindex C-/ (emms-browser) @findex emms-playlist-mode-undo Undo the previous playlist action. @item @kindex (emms-browser) @findex emms-browser-add-tracks-and-play Add all tracks at point, and play the first added track. @item @kindex (emms-browser) @findex emms-browser-prev-non-track Jump to the previous non-track element. @item @kindex (emms-browser) @findex emms-browser-next-non-track Jump to the next non-track element. @item s A @kindex s A (emms-browser) @findex emms-browser-search-by-album Search the collection by album. @item s a @kindex s a (emms-browser) @findex emms-browser-search-by-artist Search the collection by artist. @item s s @kindex s s (emms-browser) @findex emms-browser-search-by-names Search the collection by names. @item s t @kindex s t (emms-browser) @findex emms-browser-search-by-title Search the collection by title. @item b 1 @kindex b 1 (emms-browser) @findex emms-browse-by-artist Browse the collection by artist. @item b 2 @kindex b 2 (emms-browser) @findex emms-browse-by-album Browse the collection by album. @item b 3 @kindex b 3 (emms-browser) @findex emms-browse-by-genre Browse the collection by genre. @item b 4 @kindex b 4 (emms-browser) @findex emms-browse-by-year Browse the collection by year. @item W a p @kindex W a p (emms-browser) @findex emms-browser-lookup-album-on-pitchfork Lookup the album using Pitchfork. @item W a w @kindex W a w (emms-browser) @findex emms-browser-lookup-album-on-wikipedia Lookup the album using Wikipedia. @end table @node Filtering Tracks @section Filtering Tracks If you want to display a subset of your collection (such as a directory of 80s music, only avi files, etc.) then you can extend the Browser by defining ``filters''. Show everything: @lisp (emms-browser-make-filter "all" 'ignore) @end lisp Set "all" as the default filter: @lisp (emms-browser-set-filter (assoc "all" emms-browser-filters)) @end lisp Show all files (no streamlists, etc): @lisp (emms-browser-make-filter "all-files" (emms-browser-filter-only-type 'file)) @end lisp Show only tracks in one folder: @lisp (emms-browser-make-filter "80s" (emms-browser-filter-only-dir "~/Mp3s/80s")) @end lisp Show all tracks played in the last month: @lisp (emms-browser-make-filter "last-month" (emms-browser-filter-only-recent 30)) @end lisp After executing the above commands, you can use M-x emms-browser-show-all, emms-browser-show-80s, etc to toggle between different collections. Alternatively you can use '<' and '>' to cycle through the available filters. The second argument to make-filter is a function which returns t if a single track should be filtered. You can write your own filter functions to check the type of a file, etc. Show only tracks not played in the last year: @lisp (emms-browser-make-filter "not-played" (lambda (track) (not (funcall (emms-browser-filter-only-recent 365) track)))) @end lisp Show all files that are not in the pending directory: @lisp (emms-browser-make-filter "all" (lambda (track) (or (funcall (emms-browser-filter-only-type 'file) track) (not (funcall (emms-browser-filter-only-dir "~/Media/pending") track))))) @end lisp @node Displaying Covers @section Displaying Covers The browser will attempt to display cover images if they're available. Customize @var{emms-browser-covers} to configure how EMMS should retrieve the covers. By default it looks for images @file{cover_small.jpg}, @file{cover_med.jpg}, etc. Note that you'll probably want to resize your existing covers to particular sizes. Suggested sizes are 100x100 for small, and 200x200 for medium. The above behaviour demands manual processing on behalf of the user. Instead, you might prefer to automate the process by setting @var{emms-browser-covers} to 'emms-browser-cache-thumbnail': covers matching 'emms-browser-thumbnail-filter' will be automatically resized if necessary and cached to @var{emms-browser-thumbnail-directory}. The cache gets automatically updated upon change in the source folder. Customize @var{emms-browser-covers-file-extensions} to include or exclude specific extensions. 'emms-browser-cache-thumbnail' might be everytime a cover is queried, so to help with performance you can also set @var{emms-browser-covers} to 'emms-browser-cache-thumbnail-async'. The latter is like the former except that it caches queries: every subsequent query will be much faster. The drawback is that it won't see changes made to covers after the first query. To force-refresh the thumbnail cache, you can run 'emms-browser-clear-cache-hash'. Also, Emacs by default will jump around a lot when scrolling a buffer with images. In order to prevent that, you can set @var{scroll-up-aggressively} and @var{scroll-down-aggressively} to the number ``0.0''. To show a 'no cover' image for albums which don't have a cover, add the following code to your .emacs: @lisp (setq emms-browser-default-covers (list "/path/to/cover_small.jpg" nil nil) @end lisp The medium and large images can be set as well. You can download an example @uref{http://repose.cx/cover_small.jpg, `no cover' image}. @node Changing Looks @section Changing Looks The Browser's look can be customised. You can change the way the tree structure looks, the display format and display faces. @subheading Changing Tree Structure You can change the way the tree is displayed by modifying the function @command{emms-browser-next-mapping-type}. The following code displays artist->track instead of artist->album->track when you switch to the 'singles' filter: @lisp (defadvice emms-browser-next-mapping-type (after no-album (current-mapping)) (when (eq ad-return-value 'info-album) (setq ad-return-value 'info-title))) @end lisp @lisp (defun toggle-album-display () (if (string= emms-browser-current-filter-name "singles") (ad-activate 'emms-browser-next-mapping-type) (ad-deactivate 'emms-browser-next-mapping-type))) (add-hook 'emms-browser-filter-changed-hook 'toggle-album-display) @end lisp Furthermore, you can customize @var{emms-browser-get-track-field-function} to choose which the metadata fields used for the different tree nodes (@code{'info-artist}, @code{info-year}, etc.). For instance, you can choose whether to organize the tree by artist, album artist or performer. @subheading Changing Display Format Format strings govern the way items are displayed in the browser and playlist. You can customize these if you wish. @var{emms-browser-default-format} controls the format to use when no other format has been explicitly defined. By default, only track and albums deviate from the default. To customise the format of a particular type, find the name of the field you want to use (eg `info-artist', `info-title', etc), and insert that into emms-browser--format or emms-browser-playlist--format. For example, if you wanted to remove track numbers from tracks in both the browser and playlist, you could do: @lisp (defvar emms-browser-info-title-format "%i%n") (defvar emms-browser-playlist-info-title-format emms-browser-info-title-format) @end lisp The format specifiers available include: @itemize @w{} @item %i indent relative to the current level @item %n the value of the item - eg -info-artist might be ``pink floyd'' @item %y the album year @item %A the album name @item %a the artist name of the track @item %t the title of the track @item %T the track number @item %cS a small album cover @item %cM a medium album cover @item %cL a big album cover @end itemize Note that if you use track-related items like %t, it will take the data from the first track. @subheading Changing Display Faces The faces used to display the various fields are also customizable. They are in the format emms-browser--face, where type is one of "year/genre", "artist", "album" or "track". Note that faces lack the initial "info-" part. For example, to change the artist face, type M-x @command{customize-face} @command{emms-browser-artist-face}. @c ------------------------------------------------------------------- @node Sorting Playlists @chapter Sorting Playlists @cindex sort @cindex track order The `emms-playlist-sort' module, defined in the @file{emms-playlist-sort.el} package provides functions for sorting Emms playlists, as well as keyboard shortcuts for invoking the functions in the playlist buffer. Most of the functions will sort in reverse order if the command is preceded by a prefix. `emms-playlist-sort' can be loaded by invoking: @lisp (require 'emms-playlist-sort) @end lisp @defun emms-playlist-sort-by-info-artist Sort by artist name. @end defun @defun emms-playlist-sort-by-play-count Sort by number of times the track has been played. @end defun @defun emms-playlist-sort-by-info-album Sort by album name. @end defun @defun emms-playlist-sort-by-last-played Sort by time the track was played last. @end defun @defun emms-playlist-sort-by-info-title Sort by track title. @end defun @defun emms-playlist-sort-by-file-extension Sort by filename extension. @end defun @defun emms-playlist-sort-by-info-performer Sort by performer name. @end defun @defun emms-playlist-sort-by-info-year Sort by year. @end defun @defun emms-playlist-sort-by-info-note Sort by track notes. @end defun @defun emms-playlist-sort-by-info-composer Sort by composer. @end defun @defun emms-playlist-sort-by-name Sort by track name. @end defun @defun emms-playlist-sort-by-file-mtime Sort by file mtime. @end defun @c ------------------------------------------------------------------- @node Persistent Playlists @chapter Persistent Playlists The Emms module @file{emms-history.el} makes playlists persistent over emacs sessions. To make use of this feature put this into your ~/.emacs. @lisp (require 'emms-history) @end lisp When you kill emacs all playlists will be saved in the file given by the variable: @defopt emms-history-file The file to save playlists in. It defaults to "~/.emacs.d/emms-history". @end defopt After you started up emacs again, you can restore all saved playlists with this function. @defun emms-history-load Restore all playlists in `emms-history-file'. @end defun If that should be done automatically on each startup, put these lines into your ~/.emacs. @lisp (require 'emms-history) (emms-history-load) @end lisp Normally @code{emms-history} only restores playlists. If you want it to start playback afterwards, you can tweak this variable. @defopt emms-history-start-playing If non-nil emms starts playing the current track after `emms-history-load' was invoked. The default value is nil. @end defopt @c ------------------------------------------------------------------- @node Editing Tracks @chapter Editing Tracks @cindex track editor Using @file{emms-tag-editor.el}, emms can set tag informations of tracks and write them back to the file with the help of external programs, such as `mid3v2' and `vorbiscomment'. Use the keybinding @kbd{E} to edit the tags of track under point in the playlist or all marked tracks (@pxref{Markable Playlists} for how to mark tracks). The track's tag informations are listed in a special buffer `*Emms-TAGS*' in text format. Field names are marked in bold face and are not editable. Any tag information is placed behind an equal sign and is changable. A special field `name' is the track's file name. If any change is made in this field, the track's file will be renamed to the new name. When you finished editing the tag infos use @kbd{C-c C-c} (which calls @code{emms-tag-editor-submit-and-exit}) to submit the changes and close the `*Emms-TAGS*' buffer. There are a few commands to perform changes on all tracks. @defun emms-tag-editor-set-all tag value Set TAG to VALUE in all tracks. If transient-mark-mode is turned on, you can apply the command to a selected region. If `transient-mark-mode' is on and the mark is active, the changes will only take effect on the tracks in the region. @end defun @defun emms-tag-editor-replace-in-tag tag from to Query and replace text in selected TAG. For example, if the info-title tag is selected, then only perform replacement in title tags. If `transient-mark-mode' is on and the mark is active, the changes will only take effect on the tracks in the region. @end defun @defun emms-tag-editor-transpose-tag tag1 tag2 Transpose value of TAG1 and TAG2. If `transient-mark-mode' is on and the mark is active, the changes will only take effect on the tracks in the region. @end defun @defun emms-tag-editor-submit arg Make modified tags take affect. With prefix argument, bury the tag edit buffer. @end defun If you want to extend the tag editor to work with file formats other than `mp3' and `ogg', have a look at these variables. @defvr {Variable} emms-tag-editor-formats This variable determine how to insert track fields to `emms-tag-editor-edit-buffer'. Emms tag info editable fields is usually determined by the extension of track name. The variable `emms-tag-editor-tags' contains all tags that emms track may have. A single charactar is assigned to the tag to make the `emms-tag-editor-formats' easier to generate. @end defvr @defvr {Variable} emms-tag-editor-tagfile-functions To write tags to track file, an extern program should specified in this variable. @end defvr @heading Renaming Files The tag editor is also capable to rename the file of the track at point or all files of the marked tracks according to the value this variable. @defopt emms-tag-editor-rename-format When `emms-tag-editor-rename' is invoked the track's file will be renamed according this format specification. The file extension will be added automatically. It uses the format specs defined in @code{emms-tag-editor-tags}. The default value is "%a - %l - %n - %t", so that files are named - - - .<extension> after renaming. @end defopt To perform the renaming put point on the track you want to rename or mark some tracks. Then hit @kbd{R} which calls this function: @defun emms-tag-editor-rename Rename the file corresponding to track at point or all marked tracks according to the value of @code{emms-tag-editor-rename-format}. @end defun @c ------------------------------------------------------------------- @node Emms Mode Line @chapter Emms Mode Line @cindex mode line @cindex display emms information We can display information about the currenty playing track on the Emacs mode line using the package `emms-mode-line' which is provided by the file @file{emms-mode-line.el}. To activate this feature invoke: @lisp (require 'emms-mode-line) (emms-mode-line 1) @end lisp It is also possible to display the amount of time a track has been playing. This feature is defined in the `emms-playing-time' package which is provided by the file @file{emms-playing-time.el}. To use this feature invoke: @lisp (require 'emms-playing-time) (emms-playing-time 1) @end lisp A graphical icon can be displayed in the modeline when Emms is playing. This feature is provided by @file{emms-mode-line-icon.el}. To enable invoke the following and make sure that @var{emms-mode-line-icon-enabled-p} is set to a non-nil value: @lisp (require emms-mode-line-icon) @end lisp Note: `(emms-playing-time -1)' will disable emms-playing-time module completely, and is not recommended. (since some other emms modules may rely on it) Instead, to toggle displaying playing time on mode line, one could call `emms-playing-time-enable-display' and `emms-playing-time-disable-display'." @defun emms-playing-time-enable-display Display playing time on mode line. @end defun @defun emms-playing-time-disable-display Remove playing time from mode line. @end defun @c ------------------------------------------------------------------- @node Limiting @chapter Limiting @cindex limiting @cindex playlist The package `emms-playlist-limit', provided by @file{emms-playlist-limit.el}, allows creating a new playlist derived from the playlist in the current buffer. For instance, it is possible to create a new playlist containing only a certain artist or genre from the playlist in the current buffer. If the playlist in the current buffer is the emms current playlist then the derived playlist becomes current. @table @kbd @item / a @kindex / a @findex emms-playlist-limit-to-info-artist Create a new playlist buffer and populate it with tracks whose artist info field matches the given regular expression (default: the artist info field of the track at point). @item / b @kindex / b @findex emms-playlist-limit-to-info-album Create a new playlist buffer and populate it with tracks whose album info field matches the given regular expression (default: the album info field of the track at point). @item / c @kindex / c @findex emms-playlist-limit-to-info-composer Create a new playlist buffer and populate it with tracks whose composer info field matches the given regular expression (default: the composer info field of the track at point). @item / d @kindex / d @findex emms-playlist-limit-to-description Create a new playlist buffer and populate it with tracks whose track description matches the given regular expression (default: the track description of the track at point). @item / g @kindex / g @findex emms-playlist-limit-to-info-genre Create a new playlist buffer and populate it with tracks whose genre info field matches the given regular expression (default: the genre info field of the track at point). @item / n @kindex / n @findex emms-playlist-limit-to-name Create a new playlist buffer and populate it with tracks whose name matches the given regular expression (default: the name of the track at point). @item / p @kindex / p @findex emms-playlist-limit-to-info-performer Create a new playlist buffer and populate it with tracks whose performer info field matches the given regular expression (default: the performer info field of the track at point). @item / t @kindex / t @findex emms-playlist-limit-to-info-title Create a new playlist buffer and populate it with tracks whose title info field matches the given regular expression (default: the title info field of the track at point). @item / y @kindex / y @findex emms-playlist-limit-to-info-year Create a new playlist buffer and populate it with tracks whose year info field matches the given regular expression (default: the year info field of the track at point). @item / / @kindex / / @findex emms-playlist-limit-to-all Switch to the original playlist buffer (if it still exists). @end table @c ------------------------------------------------------------------- @node Music Player Daemon @chapter Music Player Daemon @cindex music player daemon @cindex remote interface @cindex mpd Emms provides an interface to the @uref{http://www.musicpd.org/, Music Player Daemon}(MusicPD) software. The package is called `emms-player-mpd' and is provided by the file @file{emms-player-mpd.el}. The advantages of using MusicPD as an Emms backend include the following. @itemize @bullet @item minimal CPU usage @item fast access of track information @item optional crossfade @end itemize @subheading Setup To load `emms-player-mpd' invoke: @lisp (require 'emms-player-mpd) @end lisp Set the variables @var{emms-player-mpd-server-name} and @var{emms-player-mpd-server-port} to the location and port (respectively) of your MusicPD server. For example: @lisp (setq emms-player-mpd-server-name "localhost") (setq emms-player-mpd-server-port "6600") @end lisp If your MusicPD setup requires a password, you will to set @var{emms-player-mpd-server-password} as follows. @lisp (setq emms-player-mpd-server-password "mypassword") @end lisp To get track information from MusicPD, invoke the following: @lisp (add-to-list 'emms-info-functions 'emms-info-mpd) @end lisp Adding `emms-player-mpd' to your Emms player list is accomplished by invoking: @lisp (add-to-list 'emms-player-list 'emms-player-mpd) @end lisp Unless your MusicPD is configured to use absolute file names, you must set the emms-player-mpd-music-directory variable to the value of 'music_directory' in your MusicPD configuration. There are additional options available as well, but the defaults should be sufficient for most uses. Once you've done the above, run the @kbd{M-x emms-cache-set-from-mpd-all} command to fill the Emms cache with the contents of your MusicPD database. The music in your MusicPD database should then be accessible via the Emms browser. You can set @var{emms-player-mpd-sync-playlist} to nil if your master Emms playlist contains only stored playlists. @subheading Commands provided @defun emms-player-mpd-connect Connect to MusicPD and retrieve its current playlist. Afterward, the status of MusicPD will be tracked. @end defun @defun emms-player-mpd-disconnect Terminate the MusicPD client process and disconnect from MusicPD. @end defun @defun emms-player-mpd-show &optional insertp Describe the current Emms track in the minibuffer. If INSERTP is non-nil, insert the description into the current buffer instead. This function uses @var{emms-show-format} to format the current track. It differs from @command{emms-show} in that it asks MusicPD for the current track, rather than Emms. @end defun @subsubheading Updating the MusicPD database @defun emms-player-mpd-update-directory dir Cause the tracks in DIR to be updated in the MusicPD database. @end defun @defun emms-player-mpd-update-all Cause all tracks in the MusicPD music directory to be updated in the MusicPD database. @end defun @subsubheading emms-cache.el integration @defun emms-cache-set-from-mpd-directory dir Dump all MusicPD data from DIR into the Emms cache. This is useful to do when you have recently acquired new music. @end defun @defun emms-cache-set-from-mpd-all Dump all MusicPD data into the Emms cache. This is useful to do once, just before using emms-browser.el, in order to prime the cache. @end defun @subsubheading emms-volume.el integration To activate this, add the following to your .emacs. @lisp (require 'emms-volume) (setq emms-volume-change-function 'emms-volume-mpd-change) @end lisp @c ------------------------------------------------------------------- @node Lyrics @chapter Lyrics @cindex lyrics We can display the lyrics of a song in time with the music using the `emms-lyrics' package provided by the file @file{emms-lyrics.el}. The lyrics files should have the extention ``.lrc'', and can be placed under either the same directory as the music files or @var{emms-lyrics-dir}. To add this feature we invoke: @lisp (require 'emms-lyrics) (emms-lyrics 1) @end lisp There are a number of variables we can set to define the way that `emms-lyrics' behaves, we can set these directly or by using the Customize feature in Emacs. @defvr {User Option} emms-lyrics-display-on-minibuffer If non-nil, display lyrics on minibuffer. @end defvr @defvr {User Option} emms-lyrics-display-on-modeline If non-nil, display lyrics on modeline. @end defvr @defvr {User Option} emms-lyrics-dir Local lyrics repository. @command{emms-lyrics-find-lyric} will look for lyrics in current directory(i.e., same as the music file) and this directory. @end defvr @defvr {User Option} emms-lyrics-display-format Format for displaying lyrics. "%s" will be replaced by the lyrics string. @end defvr @defvr {User Option} emms-lyrics-coding-system Coding system used in the output of lyrics. @end defvr @defvr {User Option} emms-lyrics-scroll-p Non-nil value will enable lyrics scrolling. @end defvr @defvr {User Option} emms-lyrics-scroll-timer-interval Interval between scroller timers. The shorter, the faster. @end defvr We can control `emms-lyrics' with the help of the following functions: @defun emms-lyrics-start Start displaying lyrics. @end defun @defun emms-lyrics-stop Stop displaying lyrics. @end defun @defun emms-lyrics-toggle-display-on-minibuffer Toggle display lyrics on minibufer. @end defun @defun emms-lyrics-toggle-display-on-modeline Toggle display lyrics on mode line. @end defun @defun emms-lyrics-enable Enable displaying Emms lyrics. @end defun @defun emms-lyrics-disable Disable displaying Emms lyrics. @end defun @defun emms-lyrics-toggle Toggle displaying Emms lyrics. @end defun @c ------------------------------------------------------------------- @node Volume @chapter Volume @cindex volume We can use the `emms-volume' package, as provided by the @file{emms-volume.el} file, to manipulate the volume. @defopt emms-volume-change-amount The amount to use when raising or lowering the volume using the emms-volume interface. This should be a positive integer. @end defopt @defun emms-volume-raise Increase the volume. @end defun @defun emms-volume-lower Decrease the volume. @end defun If you feel like binding those two functions to global keys --- don't do it or you'll miss the convenience of `emms-volume-minor-mode'. Instead, bind the following two commands to some keys that you like. @defun emms-volume-mode-plus Raise volume and enable or extend the `emms-volume-minor-mode' timeout. @end defun @defun emms-volume-mode-minus Lower volume and enable or extend the `emms-volume-minor-mode' timeout. @end defun Example: @lisp (global-set-key (kbd "C-c +") 'emms-volume-mode-plus) (global-set-key (kbd "C-c -") 'emms-volume-mode-minus) @end lisp Whenever you use one of these keys or call these functions with @kbd{M-x}, Emms will be put into `emms-volume-minor-mode' for a short period defined by `emms-volume-mode-timeout'. @defopt emms-volume-mode-timeout The timeout in amount of seconds used by `emms-volume-minor-mode'. @end defopt In this interval you can raise/lower the volume simply by pressing @kbd{+} or @kbd{-}, which will also reset the timer to its initial value. So instead of pressing @kbd{C-c +} six times to increase volume by six steps of @code{emms-volume-change-amount}, you would simply type @kbd{C-c + + + + + +}. Emms can change volume with amixer, mpd, PulseAudio and mixerctl out of the box, see @var{emms-volume-change-function}. @c ------------------------------------------------------------------- @node Streaming Audio @chapter Streaming Audio @cindex streaming audio @cindex internet radio Emms is a great way to play streaming audio and internet radio. It is possible to add streaming playlists and URLs to any playlist, but Emms also comes with a built-in, eclectic list of streaming audio stations. @footnote{Emms has no affiliation of any kind with the streaming audio stations included, nor is their inclusion an endorsement of these stations. Instead, this is a collection of stations submitted to the project over the years by people who enjoy Emms. We hope you will enjoy them too, and invite you to send in your suggestions to add to the list.} The @file{emms-streams.el} package provides the command @command{emms-streams}. Invoking @command{emms-streams} will pull up an Emms playlist buffer and populate it with the built-in list of streaming audio sources. If you are using the mpv player, defined by @file{emms-player-mpv.el}, then you can display the currently streaming track title (if the station provides that information) by configuring: @lisp (customize-set-variable 'emms-player-mpv-update-metadata t) @end lisp @c ------------------------------------------------------------------- @node APE / FLAC Commands @chapter APE / FLAC Commands Often, a single APE or FLAC file contains a complete album. We can still play next or previous track in the album with the help of @file{emms-cue.el} package, provided there is a corresponding cue sheet file. This package also defines @code{emms-info-cueinfo} for retreiving the track information for APE / FLAC itself. To load @file{emms-cue.el}: @lisp (require 'emms-cue) (add-to-list 'emms-info-functions 'emms-info-cueinfo) @end lisp @defun emms-cue-next Play next track from .cue file @end defun @defun emms-cue-previous Play previous track from .cue file @end defun @c ------------------------------------------------------------------- @node Bookmarks @chapter Bookmarks Emms can save a ``temporal bookmark'' in a media file via emms-bookmarks. The file @file{emms-bookmarks.el} provides the package emms-bookmarks. While some media is playing, invoking @kbd{M-x emms-bookmarks-add} will first pause the playback and then prompt for a name describing the bookmark. Tracks can have multiple bookmarks associated with them. To jump to the next and previous bookmarks in the current track invoke @kbd{M-x emms-bookmarks-next} and @kbd{M-x emms-bookmarks-prev} respectively. To clear all of the bookmarks for the current track invoke @kbd{M-x emms-bookmarks-clear}. @c ------------------------------------------------------------------- @node Managing Playlists @chapter Managing Playlists Emms can have multiple playlists, since a playlist is just another buffer with a list of tracks. You can manage multiple playlists using `emms-metaplaylist-mode', provided by the file @file{emms-metaplaylist-mode}. Start the playlist manager with @kbd{M-x emms-metaplaylist-mode-go}. The playlist manager will list the playlists and mark the current one. The following commands are available: @table @kbd @item RET @kindex RET @findex emms-metaplaylist-mode-goto-current Make the buffer at point the Emms playlist buffer and switch to it. @item SPC @kindex SPC @findex emms-metaplaylist-mode-set-active Make the buffer at point the Emms playlist buffer (but do not switch to it). @item n @kindex n @findex next-line Move point to the next playlist. @item p @kindex p @findex previous-line Move point to the previous playlist. @item g @kindex g @findex emms-metaplaylist-mode-update Update the playlist manager buffer. @item C @kindex C @findex emms-metaplaylist-mode-new-buffer Create a new Emms playlist buffer. @item C-k @kindex C-k @findex emms-metaplaylist-mode-kill-buffer Kill the Emms playlist buffer at point. @item c @kindex c @findex emms-metaplaylist-mode-center-current Move point to the current playlist buffer. @item q @kindex q @findex kill-this-buffer Kill the playlist manager. @end table @c ------------------------------------------------------------------- @node GNU FM @chapter GNU FM @cindex GNU FM @url{https://www.gnu.org/software/gnufm/, GNU FM} is free software for running music community websites. It was created for the music community site, @url{http://libre.fm/, Libre.fm}. Emms can send track information, and stream music from GNU FM servers using @file{emms-librefm-scrobbler.el} and @file{emms-librefm-stream.el}, respectively. Emms is configured by default to use @url{http://libre.fm/, Libre.fm}, but can work with any GNU FM server by configuring the variable @var{emms-librefm-scrobbler-handshake-url} to the URL of the GNU FM server. The recommended way of providing your credentials to the GNU FM server is by using an authinfo file. Add authentication to your auth-info file, typically @file{~/.authinfo.gpg}, as: @smallexample machine libre.fm login USERNAME password PASSWORD @end smallexample If you are using some other server than libre.fm, change ``@samp{libre.fm}'' to match @var{emms-librefm-scrobbler-handshake-url}. Alternatively, you can save the password in plaintext in your init-file by setting these variables: @lisp (setq emms-librefm-scrobbler-username "USERNAME" emms-librefm-scrobbler-password "PASSWORD") @end lisp @menu * Uploading Track Information:: How to submit listened track information. * GNU FM Streaming:: Streaming music from a GNU FM server. @end menu @node Uploading Track Information @section Uploading Track Information GNU FM servers, such as Libre.fm can optionally store a user's listening habits using information sent to the website's server from the Emms. By utilizing the records of users' listening habits, the website aims to be able to recommend music to users by analyzing their musical taste. Load the feature into Emms with: @lisp (require 'emms-librefm-scrobbler) @end lisp This feature can also be enabled via @xref{Setup}, in the `emms-all' setup level. Enable uploading the details of the tracks Emms plays to the GNU FM server with @kbd{emms-librefm-scrobbler-enable}. The track's details will be uploaded to the server when the track's playback ends. You can disable this behavior with @kbd{emms-librefm-scrobbler-disable}. @node GNU FM Streaming @section GNU FM Streaming If the GNU FM server provides a streaming music service you can take advantage of it by loading: @lisp (require 'emms-librefm-stream) @end lisp This feature can also be enabled via @xref{Setup}, in the `emms-all' setup level. Then invoke @kbd{emms-librefm-stream} and enter the URL of the station you wish to listen to, for example ``librefm://globaltags/Classical''. @c including the relevant licenses @include gpl.texi @include fdl.texi @node Concept Index @unnumbered Concept Index @printindex cp @node Function Index @unnumbered Function Index @printindex fn @node Variable Index @unnumbered Variable Index @printindex vr @node Keybinding Index @unnumbered Keybinding Index @printindex ky @bye