On Wed, 2003-02-19 at 18:32, Jonathan Turner wrote: I haven't been doing a whole lot of latency tweaking as of late.. But back when I was, I used latencytest: http://www.gardena.net/benno/linux/audio/ Its basically plays an audio test signal and then runs a series of tests (X drawing, hard disk read/write, etc) and then gives you some nice graphs to look at. I think the preempt kernel patch has a feature that will keep track of the most recent large latency spikes, although I have never tried enabling it. The lowlat patch I think also has some debugging related stuff. If you don't know about these patches already, you'll definately want to check them out. Also IDE hard disk tuning. You might already know these things, just trying to cover as much as possible. Cheers. Josh Green