hi LAUs, I've written a little python script, that may be usefull for you as well. It tries to get the pid's of soundcards irq's etc. and set's their scheduling priorities in order to improve latency performance. More info here: http://branwelt.de/projects/rt-script/ The script was quickly written and likely is not done the best possible way, but it's working (on my debian system at least, usb-card) please give some feedback, if it worked for you as well, (check if the pid's where detected correctly) (maybe + a small system-info: snd-card, distribution, kernel) If the script worked with most systems, it would be a nice idea to auto-run it after the booting-process in audio-distros (if such a thing isn't done already) Emanuel