> If I set Jack parameters in Qjackctl any lower than 1024 I get Xrun > mayhem. (at 44100) I have also tried this running from consoles as root > and it does not seem to make much difference. Am I expecting too much? Did you switch on DMA for hard disc accesses? To do that a command like this needs to be executed: # hdparm -d 1 /dev/hda Andreas