THX Giso. <br><br>I already looked into the .asoundrc Wiki. I couldn't really make sense of it. <br><br>I 'll checkout Jack. I just wanted to avoid another layer in the chain. I also didn't want to mix things<br>
on the PC side. I didn't expect difficulties to send three stereo streams straight to the device mixer.<br><br>For now the easiset solution I figured out would be to play a multichannel wav:<br><br>sox -M 1.wav 2.wav 3.wav -t wavpcm - | aplay -D plughw:0,0 -f cd<br>
<br>Cheers<br><div class="gmail_quote"><br><br>On Mon, Oct 26, 2009 at 3:23 PM, Giso Grimm <span dir="ltr"><<a href="mailto:gg3137@vegri.net">gg3137@vegri.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi Klaus,<br>
<br>
the ALSA hardware device is just a single 18 channel (or whatever number<br>
of channels you have) device. The ALSA plughw-device does some mapping,<br>
which allows playback of different channel count on your multichannel<br>
card. The signal routing can be controlled in the ALSA settings (see<br>
'route_policy').<br>
<br>
To simultaneously access the single device with different applications<br>
you should define a 'dmix' software device. I am not an expert on dmix<br>
settings, it is described on<br>
<br>
<a href="http://www.alsa-project.org/main/index.php/Asoundrc" target="_blank">http://www.alsa-project.org/main/index.php/Asoundrc</a><br>
<br>
However, I did not find a documentation on how to setup multiple stereo<br>
devices with different output channels.<br>
<br>
All this is no problem at all with jack, simply connect any client to<br>
the channels you want (or route from client to client). Most<br>
applications support jack, so it should not be a problem. No GUI is<br>
needed (for headless setups).<br>
<br>
--<br>
<font color="#888888">Giso<br>
</font><div><div></div><div class="h5"><br>
<br>
Klaus Schulz wrote:<br>
> Hi folks.<br>
><br>
> On my quest to get more then two channels from Alsa out to the 9632<br>
> I stepped over this:<br>
><br>
> I figured that there is just a pcm0p under /proc/asound/card0.<br>
><br>
> Shouldn't there be pcm0p...pcm7p reflecting the 8 Alsa stereo channels<br>
> on the HDSP?<br>
><br>
> What am I mixing up here?<br>
<br>
</div></div></blockquote></div><br>