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diff --git a/doc/user.xml b/doc/user.xml index 7e43dce8a..06dc087f0 100644 --- a/doc/user.xml +++ b/doc/user.xml @@ -72,14 +72,287 @@ cd mpd-0.14.2</programlisting> <chapter> <title>Configuration</title> - <para> - </para> + <section> + <title>Configuring audio outputs</title> + + <para> + Audio outputs are devices which actually play the audio chunks + produced by MPD. You can configure any number of audio output + devices, but there must be at least one. If none is + configured, MPD attempts to auto-detect. Usually, this works + quite well with ALSA, OSS and on Mac OS X. + </para> + + <para> + To configure an audio output manually, add an + <varname>audio_output</varname> block to + <filename>mpd.conf</filename>: + </para> + + <programlisting>audio_output { + type "alsa" + name "my ALSA device" + device "hw:0" +} +</programlisting> + </section> </chapter> <chapter> <title>Plugin reference</title> - <para> - </para> + <section> + <title>Output plugins</title> + + <section> + <title><varname>alsa</varname></title> + + <para> + The "Advanced Linux Sound Architecture" plugin uses + <filename>libasound</filename>. It is recommended if you + are using Linux. + </para> + + <informaltable> + <tgroup cols="2"> + <thead> + <row> + <entry>Setting</entry> + <entry>Description</entry> + </row> + </thead> + <tbody> + <row> + <entry> + <varname>device</varname> + <parameter>NAME</parameter> + </entry> + <entry> + Sets the device which should be used. This can be + any valid ALSA device name. The default value is + "default", which makes + <filename>libasound</filename> choose a device. It + is recommended to use a "hw" or "plughw" device, + because otherwise, <filename>libasound</filename> + automatically enables "dmix", which has major + disadvantages (fixed sample rate, poor resampler, + ...). + </entry> + </row> + <row> + <entry> + <varname>use_mmap</varname> + <parameter>yes|no</parameter> + </entry> + <entry> + If set to <parameter>yes</parameter>, then + <filename>libasound</filename> will try to use + memory mapped I/O. + </entry> + </row> + <row> + <entry> + <varname>buffer_time</varname> + <parameter>US</parameter> + </entry> + <entry> + Sets the device's buffer time in microseconds. + Don't change unless you know what you're doing. + </entry> + </row> + <row> + <entry> + <varname>period_time</varname> + <parameter>US</parameter> + </entry> + <entry> + Sets the device's period time in microseconds. + Don't change unless you really know what you're + doing. + </entry> + </row> + <row> + <entry> + <varname>auto_resample</varname> + <parameter>yes|no</parameter> + </entry> + <entry> + If set to <parameter>no</parameter>, then + <filename>libasound</filename> will not attempt to + resample, handing the responsibility over to MPD. + It is recommended to let MPD resample (with + libsamplerate), because ALSA is quite poor at doing + so. + </entry> + </row> + <row> + <entry> + <varname>auto_channels</varname> + <parameter>yes|no</parameter> + </entry> + <entry> + If set to <parameter>no</parameter>, then + <filename>libasound</filename> will not attempt to + convert between different channel numbers. + </entry> + </row> + <row> + <entry> + <varname>auto_format</varname> + <parameter>yes|no</parameter> + </entry> + <entry> + If set to <parameter>no</parameter>, then + <filename>libasound</filename> will not attempt to + convert between different sample formats (16 bit, 24 + bit, floating point, ...). + </entry> + </row> + </tbody> + </tgroup> + </informaltable> + </section> + + <section> + <title><varname>ao</varname></title> + + <para> + The <varname>ao</varname> plugin uses the portable + <filename>libao</filename> library. + </para> + </section> + + <section> + <title><varname>fifo</varname></title> + + <para> + The <varname>fifo</varname> plugin writes raw PCM data to a + FIFO (First In, First Out) file. The data can be read by + another program. + </para> + </section> + + <section> + <title><varname>jack</varname></title> + + <para> + The <varname>jack</varname> plugin connects to a JACK + server. + </para> + </section> + + <section> + <title><varname>mvp</varname></title> + + <para> + The <varname>mvp</varname> plugin uses the proprietary + Hauppauge Media MVP interface. We do not know any user of + this plugin, and we do not know if it actually works. + </para> + </section> + + <section> + <title><varname>null</varname></title> + + <para> + The <varname>null</varname> plugin does nothing. It + discards everything sent to it. + </para> + + <informaltable> + <tgroup cols="2"> + <thead> + <row> + <entry>Setting</entry> + <entry>Description</entry> + </row> + </thead> + <tbody> + <row> + <entry> + <varname>sync</varname> + <parameter>yes|no</parameter> + </entry> + <entry> + If set to <parameter>no</parameter>, then the timer + is disabled - the device will accept PCM chunks at + arbitrary rate (useful for benchmarking). The + default behaviour is to play in real time. + </entry> + </row> + </tbody> + </tgroup> + </informaltable> + </section> + + <section> + <title><varname>oss</varname></title> + + <para> + The "Open Sound System" plugin is supported on most Unix + platforms. + </para> + + <informaltable> + <tgroup cols="2"> + <thead> + <row> + <entry>Setting</entry> + <entry>Description</entry> + </row> + </thead> + <tbody> + <row> + <entry> + <varname>device</varname> + <parameter>PATH</parameter> + </entry> + <entry> + Sets the path of the PCM device. If not specified, + then MPD will attempt to open + <filename>/dev/sound/dsp</filename> and + <filename>/dev/dsp</filename>. + </entry> + </row> + </tbody> + </tgroup> + </informaltable> + </section> + + <section> + <title><varname>osx</varname></title> + + <para> + The "Mac OS X" plugin uses Apple's CoreAudio API. + </para> + </section> + + <section> + <title><varname>pipe</varname></title> + + <para> + The <varname>pipe</varname> plugin starts a program and + writes raw PCM data into its standard input. + </para> + </section> + + <section> + <title><varname>pulse</varname></title> + + <para> + The <varname>pulse</varname> plugin connects to a PulseAudio + server. + </para> + </section> + + <section> + <title><varname>shout</varname></title> + + <para> + The <varname>shout</varname> plugin connects to a ShoutCast + or IceCast server. It forwards tags to this server. + </para> + </section> + </section> </chapter> </book> |