[rescue] Can someone recommend a UNIX based Digital Audio Workstation?

[rescue at sunhelp.org]

I have a setup now running a Sonorus STUDI/O under
Linux X86, but would like to put together a non-Intel
audio workstation.

The Sun/Creative Labs Ultra seems to be discontinued,
and is 16 bit. I'd like a 20 or 24 bit card.
I see a reference to an 20 bit Ultra Pro in a press release only.
Was it ever marketed?

Any other platforms that run UNIX with good sound capabilities?

thanks,

gregory