Thanks Fons and Rui for replies, sorry this is so late, been off the net. The extra flags worked ok, but there's still problems which I guess are due to CCRMA using jack-audio-connection-kit instead of jack... but I can wait till the new usx2y is in alsa proper. (Thanks to all involved for this!) Out of interest, does anyone know how the performance compares to using the supplied drivers in Windows? (Not that I am thinking of going back, just wondering :) ) Stefan Turner ___________________________________________________________ ALL-NEW Yahoo! Messenger - all new features - even more fun! http://uk.messenger.yahoo.com