Hello all, I'm in the market for a bass trainer, something like the Tascam GB-10. Has anyone used this particular trainer? And if so, did you like it? Looking for something I can output to headphones and/or my amp, that I can use to slow the tempo of the song without affecting pitch, and/or be able to isolate and cancel the bass line. Is there any (reasonably priced) computer software that will do this? Thoughts on the GB-10? Thanks very much.