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authorMax Kellermann <max@duempel.org>2009-03-14 16:01:56 +0100
committerMax Kellermann <max@duempel.org>2009-03-14 16:01:56 +0100
commit24bc277b6955278bfef9d7e5adf0e28fd28cdc87 (patch)
tree10e8279eee33b94942b1195ed1a11fe2ecae7e4f /doc
parente12140cfce88985f9fcecb93214a94a0b9c33e7f (diff)
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doc: added "audio outputs" section to the user's manual
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-rw-r--r--doc/user.xml281
1 files changed, 277 insertions, 4 deletions
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>