I've also been having some issues with xruns (mostly while using the zynaddsubfx synth) and have been fiddling with my Jack settings to see if I can minimize them current settings: RT=true; Priority: 89; Frames: 1024; SR: 44kHz, Periods/Buffer: 3; and my latency is 69.7mS -- I'm using the 2.6.36-3.dmz.2-liquorix-686 kernel --------------------------------------------------------------- -- another weird anomaly is that I get clicks from the zynaddsubfx synth engine when pressing more than one or two keys at once or when going from one key to another -- mostly heard on pads...this happens intermittently and doesn't happen all the time settings in my limits.conf file: ================================== /etc/security/limits.conf @kim - rtprio 99 @kim - memlock unlimited settings in my audio.conf file: ================================ /etc/security/limits.d/audio.conf the same parameters are # commented out in the 'audio.conf' file do they need to be uncommented out? not sure why there exist two places and whether having one location is sufficient...? is there a thread or page where Jackd optimization is discussed in detail? I've read the Jack FAQ http://jackaudio.org/faq but it would be helpful if there was something outlining how to adjust all the various params to minimize xruns for various work environments... i.e. synth programming duplex 16 track recording laptop performance podcast etc