Does anyone know of any software that can do, basically, what the Tascam GT1MkII can do? It can slow down music but not change the key so that selected pieces can be figured out/learned by playing them slow at first. It can also be set to repetively loop selected phrases and has several othe features but the slow down and looping are what I'm looking for.

I can get the Tascam for $80 (had it on sale yesterday for $50 but I didn't act fast enough).

Thanks,
Dave