Look for pitch and tempo change in BIAB and RB help. I have used RB to raise and lower pitch which is measured in semitones. You can't make drastic changes though or it sounds terrible. I have made pitch changes to karaoke mp3's that I've downloaded from Amazon with no problem using RB. I would think that any DAW would have this feature also. I know that WavePad does. Personally, I like that feature in RB. I've never done it on the fly though. I've seen this feature on karaoke machines even cheap ones but I've never used it on such a machine.

Cornet Curmudgeon