Hi again linux audio users I kind of solved my problems with my Audiophile USB : now jack runs without any xruns, but playing anything (for example with "alsaplayer -o jack" or ardour) only outputs noise. Jack does not output any error/warning message, even whith the verbose option... any idea on what this may be ? thanks in advance... pA PS: if this can be of any hel to anyone trying to get jack working with an audiophile usb, I got it running with jackd -R alsa -P plughw:2 -C plughw:2,1 -p 256 -n 4 and turning the card off and on just before launching jack often helps (!)