I also run a USB 0404. SPDIF/Toslink should work if you route the traffic
to plughw:1,1 (I havn't checked it out on 1.0.19 though)
I set the 0404 to 24/96 under Windows. Now I am feeding it with any material re-sampled to 24/96 through MPD.
The 0404USB will work in sterero only. No fancy features are supported.
Cheers
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