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The audio module has been out for a while now but it's still fun to hack around and see what can be done using the tools we have . Peter has been asking for BUG-as-sound-server for some time now and I've tried a variety of solutions with varying degrees of success. VLC's web front-end , xmms/php wrappers , etc... The best solution I've found to date has been the project Music Player Daemon (MPD) and some cool client solutions for the iphone and desktop. Below are some instructions on how to get this going yourself:
First, as my earlier post about the repo describes, get yourself online and connected to our repo.
wget http://repo.buglabs.net/ipkg-extras.conf -O /etc/ipkg/ipkg-extras.conf
Update the index:
ipkg update
Install mpd:
ipkg install mpd libmp3lame0
It will install a bunch of dependencies, and the output will look something like:
Installing mpd (0.15-r0) to root...
Downloading http://repo.buglabs.net/armv6-extras/mpd_0.15-r0_armv6.ipk
Installing libfaad0 (2.0-r2) to root...
Downloading http://repo.buglabs.net/armv6-extras/libfaad0_2.0-r2_armv6.ipk
Installing libid3tag0 (0.15.1b-r1) to root...
Downloading http://repo.buglabs.net/armv6-extras/libid3tag0_0.15.1b-r1_armv6.ipk
Installing libvorbis (1.0.1-r3) to root...
Downloading http://repo.buglabs.net/armv6-extras/libvorbis_1.0.1-r3_armv6.ipk
Installing libogg0 (1.1-r4) to root...
Downloading http://repo.buglabs.net/armv6-extras/libogg0_1.1-r4_armv6.ipk
Installing libaudiofile0 (0.2.6-r6) to root...
Downloading http://repo.buglabs.net/armv6-extras/libaudiofile0_0.2.6-r6_armv6.ipk
Installing libmad0 (0.15.1b-r1) to root...
Downloading http://repo.buglabs.net/armv6-extras/libmad0_0.15.1b-r1_armv6.ipk
Installing libmp3lame0 (3.96.1-r4) to root...
Downloading http://repo.buglabs.net/armv6-extras/libmp3lame0_3.96.1-r4_armv6.ipk
Installing libao2 (0.8.8-r1) to root...
Downloading http://repo.buglabs.net/armv6-extras/libao2_0.8.8-r1_armv6.ipk
Installing libpulse-simple0 (0.9.10-r8.1) to root...
Downloading http://repo.buglabs.net/armv6-extras/libpulse-simple0_0.9.10-r8.1_armv6.ipk
Installing libpulse0 (0.9.10-r8.1) to root...
Downloading http://repo.buglabs.net/armv6-extras/libpulse0_0.9.10-r8.1_armv6.ipk
Installing libsamplerate0 (0.1.7-r0) to root...
Downloading http://repo.buglabs.net/armv6-extras/libsamplerate0_0.1.7-r0_armv6.ipk
Installing libsndfile1 (1.0.17-r2) to root...<script type="text/javascript" src="http://community.buglabs.net/plugin_assets/community_engine/javascripts/tiny_mce/themes/advanced/langs/en.js?1239994072"></script><script type="text/javascript" src="http://community.buglabs.net/plugin_assets/community_engine/javascripts/tiny_mce/plugins/syntaxhl/langs/en.js?1239994072"></script>x000A;Downloading http://repo.buglabs.net/armv6-extras/libsndfile1_1.0.17-r2_armv6.ipk
Package libmp3lame0 (3.96.1-r4) installed in root is up to date.
Configuring libao2
Configuring libaudiofile0
Configuring liberation-fonts
Configuring libfaad0
Configuring libid3tag0
Configuring libmad0
Configuring libmp3lame0
Configuring libogg0
Configuring libpulse-simple0
Configuring libpulse0
Configuring libsamplerate0
Configuring libsndfile1
Configuring libvorbis
Configuring mpd
Adding system startup for /etc/init.d/mpd.
Starting music player daemon: mpdlog: problem opening log file "/var/lib/mpd/mpd.log" (config line 33) for writing
Aborted
.
Ok, now do some simple configuring to get it up and running correctly:
mkdir -p /var/lib/mpd/playlists
Open up the config and swap out some lines. Mostly I want to change where the mp3 files should be looked for (/home/root/music/), My config ends up looking like:
# An example configuration file for MPD
# See the mpd.conf man page for a more detailed description of each parameter.
# Required files and directories ##############################################
#
# This setting controls the top directory which MPD will search to discover the
# available audio files and add them to the daemon's online database.
#
#music_directory "~/music"
music_directory "/home/root/music"
#
# This setting sets the MPD internal playlist directory. The purpose of this
# directory is storage for playlists created by MPD. The server will use
# playlist files not created by the server but only if they are in the MPD
# format.
#
#playlist_directory "~/.mpd/playlists"
playlist_directory "/var/lib/mpd/playlists"
#
# This setting sets the location of the MPD database. This file is used to
# load the database at server start up and store the database while the
# server is not up.
#
#db_file "~/.mpd/database"
db_file "/var/lib/mpd/mpd.db"
#
# These settings are the locations for the daemon log files for the daemon.
# These logs are great for troubleshooting, depending on your log_level
# settings.
#
#log_file "~/.mpd/log"
#error_file "~/.mpd/error-log"
log_file "/var/lib/mpd/mpd.log"
error_file "/var/lib/mpd/mpd.error"
###############################################################################
# Optional files ##############################################################
#
# This setting sets the location of the file which stores the process ID
# for use of mpd --kill and some init scripts. This setting is disabled by
# default.
#
#pid_file "~/.mpd/pid"
pid_file "/var/lib/mpd/mpd.pid"
# This setting sets the location of the file which contains information about
# most variables to get MPD back into the same general shape it was in before
# it was brought down. This setting is disabled by default.
#
#state_file "~/.mpd/state"
state_file "/var/lib/mpd/mpdstate"
#
###############################################################################
# General music daemon options ################################################
#
# This setting specifies the user that MPD will run as, if set. MPD should
# never run as root and you may use this setting to make MPD change its user
# id after initialization. Do not use this setting if you start MPD as an
# unprivileged user. This setting is disabled by default, and the server will
# run as root.
#
#user "nobody"
#
# This setting sets the address for the daemon to listen on. Careful attention
# should be paid if this is assigned to anything other then the default, any.
# This setting can deny access to control of the daemon.
#
# For network
bind_to_address "any"
#bind_to_address "127.0.0.1"
#
# And for Unix Socket
#bind_to_address "~/.mpd/socket"
#
# This setting is the port that is desired for the daemon to get assigned to.
#
port "6600"
#
# This setting controls the type of information which is logged. Available
# setting arguments are "default", "secure" or "verbose". The "verbose" setting
# argument is recommended for troubleshooting, though can quickly stretch
# available resources on limited hardware storage.
#
#log_level "default"
#
# If you have a problem with your MP3s ending abruptly it is recommended that
# you set this argument to "no" to attempt to fix the problem. If this solves
# the problem, it is highly recommended to fix the MP3 files with vbrfix
# (available from ), at which
# point gapless MP3 playback can be enabled.
#
#gapless_mp3_playback "yes"
#
# This setting enables MPD to create playlists in a format usable by other
# music players.
#
#save_absolute_paths_in_playlists "no"
#
# This setting defines a list of tag types that will be extracted during the
# audio file discovery process. Optionally, 'comment' can be added to this
# list.
#
#metadata_to_use "artist,album,title,track,name,genre,date,composer,performer,disc"
#
###############################################################################
# Symbolic link behavior ######################################################
#
# If this setting is set to "yes", MPD will discover audio files by following
# symbolic links outside of the configured music_directory.
#
#follow_outside_symlinks "yes"
#
# If this setting is set to "yes, MPD will discover audio files by following
# symbolic links inside of the configured music_directory.
#
#follow_inside_symlinks "yes"
#
###############################################################################
# Zeroconf / Avahi Service Discovery ##########################################
#
# If this setting is set to "yes", service information will be published with
# Zeroconf / Avahi.
#
zeroconf_enabled "yes"
#
# The argument to this setting will be the Zeroconf / Avahi unique name for
# this MPD server on the network.
#
zeroconf_name "Music Player"
#
###############################################################################
# Permissions #################################################################
#
# If this setting is set, MPD will require password authorization. The password
# can setting can be specified multiple times for different password profiles.
#
#password "password@read,add,control,admin"
#
# This setting specifies the permissions a user has who has not yet logged in.
#
#default_permissions "read,add,control,admin"
#
###############################################################################
# Audio Output ################################################################
#
# MPD supports various audio output types, as well as playing through multiple
# audio outputs at the same time, through multiple audio_output settings
# blocks. Setting this block is optional, though the server will only attempt
# autodetection for one sound card.
#
# See for examples of
# other audio outputs.
#
# An example of an ALSA output:
#
#audio_output {
# type "alsa"
# name "My ALSA Device"
# device "hw:0,0" # optional
# format "44100:16:2" # optional
#}
#
# An example of an OSS output:
#
audio_output {
type "oss"
name "My OSS Device"
device "/dev/dsp2" # optional
format "44100:16:2" # optional
}
#
# An example of a shout output (for streaming to Icecast):
#
#audio_output {
# type "shout"
# encoding "ogg" # optional
# name "My Shout Stream"
# host "localhost"
# port "8000"
# mount "/mpd.ogg"
# password "hackme"
# quality "5.0"
# bitrate "128"
# format "44100:16:1"
# protocol "icecast2" # optional
# user "source" # optional
# description "My Stream Description" # optional
# genre "jazz" # optional
# public "no" # optional
# timeout "2" # optional
#}
#
# An example of a pulseaudio output (streaming to a remote pulseaudio server)
#
#audio_output {
# type "pulse"
# name "My Pulse Output"
# server "remote_server"
# sink "remote_server_sink"
#}
#
## An example of a null output (for no audio output):
#
#audio_output {
# type "null"
# name "My Null Output"
#}
#
# This setting will change all decoded audio to be converted to the specified
# format before being passed to the audio outputs. By default, this setting is
# disabled.
#
#audio_output_format "44100:16:2"
#
# If MPD has been compiled with libsamplerate support, this setting specifies
# the sample rate converter to use. Possible values can be found in the
# mpd.conf man page or the libsamplerate documentation. By default, this is
# setting is disabled.
#
#samplerate_converter "Fastest Sinc Interpolator"
#
###############################################################################
# Volume control mixer ########################################################
#
# MPD has limited volume controls, to use them pick one below. If one is not
# specified it may be autodetected at startup, depending on the dependencies
# which were compiled into the server.
#
# An example for controlling an ALSA mixer:
#
#mixer_type "alsa"
#mixer_device "default"
#mixer_control "PCM"
#
# An example for controlling an OSS mixer:
#
mixer_type "software"
mixer_device "/dev/mixer2"
#
# This example is a general volume control mixer, it is used to adjust the
# volume of the audio sent to the audio output, and will work with all outputs.
#
#mixer_type "software"
#
###############################################################################
# Normalization automatic volume adjustments ##################################
#
# This setting specifies the type of ReplayGain to use. This setting can have
# the argument "album" or "track". See for more
# details. By default this setting is disabled.
#
#replaygain "album"
#
# This setting sets the pre-amp used for files that have ReplayGain tags. By
# default this setting is disabled.
#
#replaygain_preamp "0"
#
# This setting enables on-the-fly normalization volume adjustment. This will
# result in the volume of all playing audio to be adjusted so the output has
# equal "loudness".
#
#volume_normalization "no"
#
###############################################################################
# MPD Internal Buffering ######################################################
#
# This setting adjusts the size of internal decoded audio buffering. Changing
# this may have undesired effects. Don't change this if you don't know what you
# are doing.
#
#audio_buffer_size "2048"
#
# This setting controls the percentage of the buffer which is filled before
# beginning to play. Increasing this reduces the chance of audio file skipping,
# at the cost of increased time prior to audio playback.
#
buffer_before_play "50%"
#
###############################################################################
# HTTP Streaming Proxy ########################################################
#
# This setting specifies the HTTP proxy to use for playing HTTP streams. By
# default, these settings will be disabled.
#
#http_proxy_host "proxy.isp.com"
#http_proxy_port "8080"
#http_proxy_user "user"
#http_proxy_password "password"
#
###############################################################################
# Resource Limitations ########################################################
#
# These settings are various limitations to prevent MPD from using too many
# resources. Generally, these settings should be minimized to prevent security
# risks, depending on the operating resources.
#
#connection_timeout "60"
#max_connections "10"
#max_playlist_length "16384"
#max_command_list_size "2048"
#max_output_buffer_size "8192"
#
###############################################################################
# Character Encoding ##########################################################
#
# If file or directory names do not display correctly for your locale then you
# may need to modify this setting. After modification of this setting mpd
# --create-db must be run to change the database.
#
filesystem_charset "UTF-8"
#
# This setting controls the encoding that ID3v1 tags should be converted from.
#
#id3v1_encoding "ISO-8859-1"
#
###############################################################################
Now put some files in the dir you want recursed for mp3's:
scp jconnolly@jconnolly-linux:"/home/jconnolly/Music/Tristeza\ -\ Dream\ Signals\ in\ Full\ Circles/*.mp3" /home/root/music/
Create the index db:
mpd --create-db
Start and stop mpd:
/etc/init.d/mpd stop
/etc/init.d/mpd start
Now go install some apps to control the music server daemon. Some clients:
For your iphone/ipod touch, via the app store: http://www.katoemba.net/makesnosenseatall/mpod/
For your linux PC: http://ario-player.sourceforge.net/
List of other client programs:
http://mpd.wikia.com/wiki/Clients
Enjoy.
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Thanks for such clear explanation.
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