Well, that's why I use csound, except the only problem is that its very time consuming, takes weeks to do just one song, because I have to enter every note by hand. In that way I can transcribe rhythm tracks that aren't consistant, because I have such atomic level control. I also have created some composition techniques that would be impossible to do with most midi sequencers because I'm both using pitches that are outside those notes supported by midi, and I'm also running five different time signatures against each other. But like I said the drawback to this approach is that its like pointalist painting, and it takes forver to compose a tune.
