Hi, i'm a german nerd/musician and i'm plaing with chuck atm. I succesfully compiled the latest release for jack support. But it seems chuck has some RT issues. running the mand-o-matic example i get a cpu load of about 2-3% but xruns nonetheless. I run jackd at a buffer size of 256 frames atm (which is plenty huge for my standards. i.e. i use 16 or 32 frames to apply realtime effects to my guitar via jack-rack - completely xrun free. This is a nicely tuned realtime preemption system with a delta 66). I heard there's a 1.2 version in cvs. Does it have this kind of problem also? BTW: i get quite a few clicks/pops on moving windows/etc. even w/o RtApiJack: audio overrun/underrun reported! and xruns. But there's quite a few of these, too. Inspecting ~$ ps -C chuck -cmL PID LWP CLS PRI TTY TIME CMD 23421 - - - pts/6 00:00:07 chuck - 23421 TS 24 - 00:00:04 - - 23422 FF 109 - 00:00:02 - it seems to my uneducated eye, that chuck has two threads. One running SCHED_FIFO (probably the jack process() thread) and another SCHED_OTHER thread. Maybe the RT thread often waits for the SCHED_OTHER thread which gets starved by other cpu activity (like moving windows, etc) If this is a RTFM! issue i will be happy to accept pointers. Flo -- Palimm Palimm! http://affenbande.org/~tapas/