That's what I use 'Transcribe' for. Think it was $30 after the free trial. It will let you loop a section and it has a speed slider without changing pitch

Still don't have VG's lead on 'Liza Jane' down pat, but getting closer.

Also Troy Cook's lead on David Ball's 'Bad Day For The Blues' is a tough one with a speedy run at the end I'm still not sure of.

Steuart Smith's leads on 'How Long' by the Eagles are fun.

Yeah, I like Transcribe.