It was a bit of a hassle to get it up and running (we
are running the
lastest version of DeMuDi), but we got it working for audio in/out
(when using jack, increasing the Periods/buffer parameter from 2 to
10 made the audio free of distortion. With the -default?- setting of
2, it sounded horrible). Till now, we couldn't get it working for
MIDI in/out.
There's a dedicated ALSA module for this device: snd-usb-usx2y. Did you
use it or did you drive it via snd_usb_audio?
Best regards
ce