Thanks gkellum

And just to clarify – it should be able to “pitch shift” an entire true stereo signal (with multiple instruments) in semitone increments (or not) in a range of plus and minus 1 octave. No warbling and as little latency as possible. I have the feeling that if anyone can do this, you can. I also suspect many other people would be interested in this algorhythm. Currently I believe there is nothing out there like this. Cheers. gt