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diff --git a/doc/user.xml b/doc/user.xml
index d90fce9c6..99278a69b 100644
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@@ -1398,6 +1398,59 @@ systemctl start mpd.socket</programlisting>
The <varname>ao</varname> plugin uses the portable
<filename>libao</filename> library.
</para>
+
+ <informaltable>
+ <tgroup cols="2">
+ <thead>
+ <row>
+ <entry>Setting</entry>
+ <entry>Description</entry>
+ </row>
+ </thead>
+ <tbody>
+ <row>
+ <entry>
+ <varname>driver</varname>
+ <parameter>D</parameter>
+ </entry>
+ <entry>
+ The <filename>libao</filename> driver to use for
+ audio output. Possible values depend on what libao
+ drivers are available. See <ulink
+ url="http://www.xiph.org/ao/doc/drivers.html">http://www.xiph.org/ao/doc/drivers.html</ulink>
+ for information on some commonly used drivers.
+ Typical values for Linux include "oss" and "alsa09".
+ The default is "default", which causes libao to
+ select an appropriate plugin.
+ </entry>
+ </row>
+
+ <row>
+ <entry>
+ <varname>options</varname>
+ <parameter>O</parameter>
+ </entry>
+ <entry>
+ Options to pass to the selected
+ <filename>libao</filename> driver.
+ </entry>
+ </row>
+
+ <row>
+ <entry>
+ <varname>write_size</varname>
+ <parameter>O</parameter>
+ </entry>
+ <entry>
+ This specifies how many bytes to write to the audio
+ device at once. This parameter is to work around a
+ bug in older versions of libao on sound cards with
+ very small buffers. The default is 1024.
+ </entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </informaltable>
</section>
<section>