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author | Lennart Poettering <lennart@poettering.net> | 2006-04-26 21:31:51 +0000 |
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committer | Lennart Poettering <lennart@poettering.net> | 2006-04-26 21:31:51 +0000 |
commit | c29b3f11e271757d60e72480030011913f778878 (patch) | |
tree | 205c46e47168a1468ac378e14b5fe94a792efb89 /doc/FAQ.html.in | |
parent | dff0822721c87884cd2185ac65c346a284b08542 (diff) |
doc update for 0.8.1
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@812 fefdeb5f-60dc-0310-8127-8f9354f1896f
Diffstat (limited to 'doc/FAQ.html.in')
-rw-r--r-- | doc/FAQ.html.in | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/doc/FAQ.html.in b/doc/FAQ.html.in index 7adc2441..a042dd7b 100644 --- a/doc/FAQ.html.in +++ b/doc/FAQ.html.in @@ -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/> |