I don't know what WASAPI is, or is not. I do know that I installed Sonar on a 10 year old quad core last night and the WASAPI mode has it running with 10ms latency on the Realtek audio chip. Previously I could only get 8.5 to run on that machine using MME. Junk has some value again.
Now if they could only get that ripple editing thing to happen.