hi,
the ESI UDJ6 USB sound card works on the raspberry pi with pd and alsa driver. UDJ6 provide 6 output channel and no input.
I have 6 channels @ 44,1 kHz and 48 kHz in 24 bit depth Blocksize of 64 samples and 9 ms of latency no click when playing wav file direct from SD card
ESI UDJ 6 can be used ar 96 kHz but I can't do it with pd and I'm not interested in because only 2 channels are available at this frequency
cheers
antoine
-- do it yourself http://antoine.villeret.free.fr