I believe that ALSA supports it to some extent (I'm basing this on having glimpsed it in the working soundcard matrix as I flipped by looking for something else).  http://alsa-project.org/alsa-doc/
Levi
> Hey guys;
> 
> I'm in the process of building a new system and was wondering if any of 
> you knew the status of support for the Creative Labs Audigy (both the 
> MP3+ 5.1 and the X-Gamer 5.1). From the information I've found, I'm 
> seeing that it's NOT supported, but there's no date on the page, so I 
> don't know how old that information is, Can anyone help?
> 
> Gnorb
> 
-- Levi Bard levi@bard.sytes.net http://bard.sytes.net GooSNES - Lightweight, featureful GTK+ snes9x frontend - http://bard.sytes.net/goosnes/ TakCD - highly embeddable commandline cd player - http://bard.sytes.net/takcd/
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