Hi Ralf,

> Does anybody know how to use two hw audio devices simultaneously, both
> duplex?

There are some tips here:

http://www.jrigg.co.uk/linuxaudio/ice1712multi.html

> has anybody ever tested if Envy24 based 'stereo' cards can be used
> with S/PDIF and the own converters at the same time?

That should work if you can sync the word clocks.

Cheers!

Daniel
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