Hi Jordan, thank you for the advices! I wiped out my Ubuntu installation and now I have a fresh Ubuntu 10.04 with Kxstudio's ppa (wine-rt 1.3.9, wineASIO 0.9.0, jack2). You told me that you had to rollback your Battery version, which version you have now? 2. What is exactly SMP support? I can't be able to find it. 3. Ok, I reduced to one stereo output for testing. 4. I don't use DFD: I load all the samples in memory. I'll make another test, Thank you! Nicola