Yes, I am having this same problem. The funny thing is that I have not experienced this problem with PCI128 card... At least I don't recall (yes, occasionally something like that would happen but it was so rare). I first started having notorious problems of this sort when I was working on a 64bit machine running linux in 32bit mode. That box had hammerfall digi9652 card and while everything was working fine occasionally I would get the same symptoms you described. When I got back home I discovered that my PCI128 card died (?!) and so I was running the onboard audio for a while and was having this crackle problem all the time. I then installed a Chaintech AV710 (envy24HT-S chip) and I am having the same problems (and in similar to yours circumstances: adding/quitting apps, zynaddsubfx, etc). I tried various versions of jack as well, but still no luck. This is actually making me quite nervous because I have a show coming up in 2 weeks and would not like anything like that to happen in performance. So, I too, would very much appreciate any pointers towards solution. Up until now I was running a 2.6.10 multimedia kernel (demudi) and just upgraded the kernel to the 2.6.12-3-multimedia in hope that this would somehow, magically, solve my problem. No luck. ./MiS Salvatore Di Pietro <salvuz_78@xxxxxxxxxxx> writes: > So no one is having this problem anymore? > I really wonder what can cause this behaviour... wheter an unfortunate > combination of hardware (even though on four different machines with > different cards and chipsets seems a bit strange to me...) or a jackd > bug... :( > > ciao > -- > salvuz > POST FATA RESVRGO > Linux registered user #291700 | machine #174619 > get counted on ---> http://counter.li.org/ <---