On Fri, 2011-06-10 at 20:50 +0200, Martin wrote: Thank you Martin :) I guess I've to do a cross-post, to correct misinformation :). $ uname -a Linux debian 2.6.39.1 #1 SMP PREEMPT Tue Jun 7 01:40:05 CEST 2011 x86_64 GNU/Linux $ jackd --sync -Xalsarawmidi -dalsa -r48000 -p1024 jackdmp 1.9.8 As expected this does work. $ jackd --sync -Xalsarawmidi -dalsa -r48000 -p64 jackdmp 1.9.8 Unexpected, this does work too :). Hm? I don't know what was bad, that it didn't work before. Tired, making a typo? Choosing a bad combination of values? I've got it ... -p520 oops. Thank you very much. Btw. I'll use ADAT too, regarding to severe weather I didn't get around to test/use the card + ADAT. I just listened by the cards outputs to a youtube video. I guess this night I'll have fun with the card :). Regards, Ralf