Hello there! So now again I am here with a problem including me and my kXAudio Drivers. I wouldn't turn to you if I wasn't absolutely desperate and hadn't tried everything else (Knowledgebase, FAQ, etc...) So here's the big deal: I had my recording machine upgraded, because it always throttled aroung 80% of my CPU Usage in Cubase, as soon as a project reached its higher places. Here's my old setup: AMD Athlon 1000 MHz 256 MB SDRAM Creative Labs SoundBlaster Live!Drive 5.1 Windows 2000 Cubase SX 2.0 The new one is: AMD Athlon 2800+ Some WinFast Motherboard... 1024 DDR Ram Live!Drive Windows XP Cubase SX 2.0 The kX Drivers used are still from the current safe release 3537. I also added a new USB-MIDI-Keyboard: M-AUDIO Keystation 88es. I mention the Keyboard because it seems to be having to do something with it. Let's say, I load a project in Cubase that used to suck up 80% of my CPU performance. First glance: "Cool, it only takes 20%! I can finally get back to business!" I load the demo of CronoX3 Synthesizer, cause I wanted to listen to it... bang: Crackles and pops all over the place. The whole audio reproduction crashes, the synchronized MIDI-Drummachine plays as if it has lost all basic motoric functions... in a word: shit! I admit: I was eager to try a lower latency than before. I thought, this machine was able to handle 10.66ms. But it doesn't. Neither does it 21.33ms... nor 43ms... What the hell is up with this machine?? The slower one worked better! If you need any more information, please ask. I do not know, what you might need to know in order to help me out. I am absolutely desperate! What use is a high end machine with no way of recording? *sits down and cries* I'd be thankful for every aid! Greets, Yann edit: The crackling does not only happen with CronoX3, but with ALL VST Instruments... even mda Piano... furthermore it occurs when I select (!) an Audio channel in the project window... how sick is that??