On Tue, 2006-02-21 at 19:16 -0800, Mark Knecht wrote: > Just speaking logically, if badly written apps can cause a real-time > kernel to have some xruns, then isn't it true that a badly written WM > could do the same thing? When I say badly written apps I am taking about the JACK client's processing thread. These xruns are not caused by the kernel. If a JACK client sleeps in the process() callback or tries to do 10ms worth of work with a 5ms deadline then xruns are inevitable, the best RTOS in the world will not help you. Lee