Hmm Hmm, what is "operator 0 envelope?"
It means no envelope. In the future when I implement drawing of envelopes I want that to draw the operator envelope that's currently being edited.
No worries on the algorithm and envelope drawing guys. I want to get more sound stuff out of the way before I do that. Also, once I start working on Groove I'm also adding in the Options Menu, tempo control and palette editing.