[AG-TECH] Multi-channel audio and ALSA

Robert Olson olson at mcs.anl.gov
Wed Apr 10 10:46:28 CDT 2002

At 04:38 PM 4/10/2002 +0100, Osland, CD (Chris) wrote:
>I've just started looking a bit more seriously at multi-channel audio
>cards in the context of AG.  One reason is a general interest in spatial
>placement of sound (audio follow video to misuse a term!) and the
>other is as a way of underpinning the idea of a global gig.
>It appears that ALSA drivers cover a wider range of multi-channel
>cards than OSS, and happen to include a driver for the cards I have
>in my studio, the Korg 1212 I/O.

Cool. We've got a midiman delta 44 that we've played with some, but not as 
much as we'd like :-).

>Does anyone have comments concerning how the ALSA drivers work
>in an AG context?  I note that amongst the applications, there are some
>files in .../mbone/rat/... that may be relevant.  At this point I'm only
>exploring audio under Linux, not Windows.

I ported rat to the 0.5 version of the ALSA drivers (auddev_alsa in the rat 
distribution). I like the ALSA drivers much better than OSS, and only 
partly because they're free. They are going to be the audio drivers in the 
2.6 linux kernel chain (they are there now in 2.5). Updating that port to 
the 0.9 version would be a good thing.

>I don't want to pursue possible use of these drivers - when we are quite
>happy with the OSS drivers - if there are any fundamental problems.

For the professional multichannel cards, I suspect we will be happier with 

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