Ticket #5088 (new defect)
Audio-processing overloads processor and slows output to a stop
|Reported by:||jlblom||Owned by:|
|Version:||VirtualBox 3.0.6||Keywords:||slowing sound load 100%|
I'm running virtualbox on an AMD Phenom II 4-core, 4GB memory. Host Os is Ubuntu jaunty (9.04). The guest OS is Windows XP + SP2 which I run with one core enabled. I'm running a rather heavy application in the guest which use sound intensively.This application, Finale, is a music notation program which can play the score written. When I have a score of say 100 bars, and let it play then after a few bars, the tempo of playing diminishes until, instead of say 90 bpm (beats/min.) it slows to less then 10 (and then I cut it off). When I look at the load, one processor runs at 100% continuously. When I play sound in e.g.a youtube film, the load is much lower although considerable, approx. 75% of one processor (but it is of course video and sound) but the sound is equal throughout. I have used the program on an original Windows installation on a slow system and I didn't have this problem ( although the sound reproduction was imperfect due to memory limitations). The audio is the board-integrated audio controller VIA 1708S. Virtualbox host driver: OSS Controller: ICH AC97. This is the best setting as with Pulse-audio the sound is distorted and the choice Soundblaster16 (as host driver) doesn't work at all. It is very important for me to have it solved as I use the program on a daily base.