What are each of these drivers use and why are there options? Also, I'm confused over what Multichannel means with WDM? I've always used ASIO drivers but since I upgraded my studio with new converters and interface, including Win7 64, the ASIO will randomly causes major latency so I have to turn on MME, save and then back to ASIO. Its most likely a bug in my DAW, the CP or a setting that I need to find but its a bit confusing and frustrating. I'm obviously having a conflict somewhere. Any ideas why this would happen? MME sure runs really fast but I can't do VSTi monitoring. Thanks ahead of time for taking the time to explain this for me!