Yes, I think the pcm "stream" is ending with plug pcm, the multi and route pcm are pieces of a unique pcm pipe. This maybe help to figure that(this is pcm types order): hw --> multi --> route --> plug(ending an PCM pipe) = Complete PCM Stream(PCM Working for applications). Or hw --> dmix(optional) --> multi --> route --> plug(ending an PCM pipe) = Complete PCM Stream(PCM Working for applications). Or hw --> dmix(optional) --> multi --> route --> asym(optional - Used to create a duplex PCM with capture and playback capabilities) --> plug(ending an PCM pipe) = Complete PCM Stream(PCM Working for applications). And so on... So, only a pcm multi don't finalize a working pcm stream to be used for an application. Note the name of pcm: plug. plug to plugged in(?). An application "plug" him. :) I love ALSA for permit us to extract the maximum of sound card, with script creating new pcm. I have lot of pcm in my .asoundrc, creating pcm for various use. I have pcm making my sound card 7.1 in more than one sound card, and etc. You're welcome. On 09-01-2011 15:59, Mark Goldstein wrote: > Hi, > > On Sun, Jan 9, 2011 at 2:06 AM, Leonardo Gomes<leogolima@xxxxxxxxxxxx> wrote: >> Hi, >> >> Sorry for late reply, i'm busy all day. >> >> I think the problem is you using the pcm multi to play wave file(aplay >> shell command). >> >> I think the correct is use a plug pcm to "fix" the channel count. >> >> A plug pcm is very usefull as i mentioned in the previous email. >> > ... > > Yep, you are right. It works correctly with plug pcm. > Well, I still want to understand it better (I could play stereo "wave" > on both hw devices, but pcm "multi" that combines these 2 devices > seems to not accepting 2 channels). But having it working now is good > enough. > > Thanks a lot for your help! ------------------------------------------------------------------------------ Gaining the trust of online customers is vital for the success of any company that requires sensitive data to be transmitted over the Web. Learn how to best implement a security strategy that keeps consumers' information secure and instills the confidence they need to proceed with transactions. http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
