Yeah, VSTi instruments are controlled via midi. What I'm doing is running a few things together under the Acid umbrella so to speak. I've got my Korg Mono/Poly going and it's synched to Acid via a click track coming out of Acid, and I'm recording the audio from that. Anyway, the real issue is my Moog Modular VSTi. I want to run that (synched to the tempo map in Acid) along with other things. Yeah, I could just setup a sequence on the Moog via a midi note, but when I render that track down, it doesn't keep any moves I make on the Moog like real time filter adjustments and so forth. Furthermore, the automation between Acid and the Moog plug in don't work all that well. I'd love to be able to just do what I want on the Moog in real time, and just record the audio as I do it. This will help also because when I'm done, I can just save the audio and take off the Moog to save CPU.