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doc update for 0.8.1

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@812 fefdeb5f-60dc-0310-8127-8f9354f1896f
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Lennart Poettering 2006-04-26 21:31:51 +00:00
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doc/FAQ.html.in
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@ -224,7 +224,7 @@ load-module module-rtp-recv sink=rtp
set-default-source rtp_monitor
</pre>
<p>Now the audio data will be available from the default source <tt>rtp_monitor</tt>.</p>
<p>Now the audio data will be available from the default source <tt>rtp_monitor</tt>.</p></li>
<li><p><b>When sending multicast RTP traffic it is recieved on the entire LAN but not by the sender machine itself!</b></p>
@ -237,6 +237,52 @@ the <tt>destination</tt>/<tt>sap_address</tt> arguments of the RTP
modules to select them. Choose your group addresses from the range
<tt>225.0.0.x</tt> to make sure the audio data never leaves the LAN.</p></li>
<li><p><b>Can I use Polypaudio to playback music on two sound cards simultaneously?</b></p>
<p>Yes! Use <a href="modules.html#module-combine"><tt>module-combine</tt></a> for that.</p>
<pre>
load-module module-oss-mmap device="/dev/dsp" sink_name=output0
load-module module-oss-mmap device="/dev/dsp1" sink_name=output1
load-module module-combine sink_name=combined master=output0 slaves=output1
set-sink-default combined
</pre>
<p>This will combine the two sinks <tt>output0</tt> and
<tt>output1</tt> into a new sink <tt>combined</tt>. Every sample
written to the latter will be forwarded to the former two. Polypaudio
will make sure to adjust the sample rate of the slave device in case
it deviates from the master device. You can have more than one slave
sink attached to the combined sink, and hence combine even three and
more sound cards.</p> </li>
<li><p><b>Can I use Polypaudio to combine two stereo soundcards into a virtual surround sound card?</b></p>
<p>Yes! You can use use <a href="modules.html#module-combine"><tt>module-combine</tt></a> for that.</p>
<pre>
load-module module-oss-mmap device="/dev/dsp" sink_name=output0 channel_map=left,right channels=2
load-module module-oss-mmap device="/dev/dsp1" sink_name=output1 channel_map=rear-left,rear-right channels=2
load-module module-combine sink_name=combined master=output0 slaves=output1 channel_map=left,right,rear-left,rear-right channels=4
</pre>
<p>This is mostly identical to the previous example. However, this
time we manually specify the channel mappings for the sinks to make
sure everything is routed correctly.</p>
<p>Please keep in mind that Polypaudio will constantly adjust the
sample rate to compensate for the deviating quartzes of the sound
devices. This is not perfect, however. Deviations in a range of
1/44100s (or 1/48000s depending on the sampling frequency) can not be
compensated. The human ear will decode these deviations as minor
movements (less than 1cm) of the positions of the sound sources
you hear. </p>
</li>
</ol>
<hr/>