[linux-audio-dev] alsa mixing

Milan Mimica milan.mimica at gmail.com
Mon Jan 8 22:23:17 UTC 2007


We're designing a new sound subsystem for allegro game programming 
library, and we would like to take advantages of multiple hardware voice 

On linux, ALSA is the only software that possibly could expose API for 
such a capability, is that right? It is possible to open multiple PCM 
outputs and play sound at the same time on all of them. The problem is 
that we miss some basic mixing features, like panning a mono sound on 
multichannel output for example. A similar feature is implemented as 
'route' ALSA plug-in that can be specified in .asoundrc file, but it is 
not flexible enough.

So the question is, does ALSA provide such functionality? If not, which 
library could? Is it possible that linux OS doesn't provide any API to 
take advantage of such hardware capabilities?

Milan Mimica

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