Celemony Software is a developer for audio tools and they have produced a product that I, frankly, thought wasn’t possible. If you’ve ever worked with audio or sound programs, you know the complexity of a sound wave. Sure, you can play games with it so much to affect pitch, tempo, or even compression ratio, but there was only so much that you could do. With their Direct Note Access, you are now able to manipulate the individual notes of a polyphonic track. Below is a YouTube version of their demo video or you can see a higher quality copy on their site along with other information.
I’ll have to share this info with the audio guys at work but I imagine they’ve already heard about it.