9 Jan
2007
9 Jan
'07
9:32 p.m.
Milan Mimica wrote:
Hello!
We're designing a new sound subsystem for allegro game programming
library, and we would like to take advantages of multiple hardware voice
capabilities.
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?
Surely this is a task that is up to the app to handle?
You would have to provide a function to move the mono signal across the
channel array accounting for volume. It would not be too difficult once
the base code for the channel handling was in place.
--
Patrick Shirkey - Boost Hardware Ltd.
Http://www.boosthardware.com
Http://lau.linuxaudio.org - The Linux Audio Users guide
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"Anything your mind can see you can manifest physically, then it will
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