This isn't working for me either. I'm just now exploring the half and double time feature myself, and I'm having the same results as mellowstu. If my song is at 65 BPM, and I choose a snarly, wild electric guitar solo that's at 120, it doesn't seem to matter whether I put a checkmark next to "Double Time?" when choosing the Soloist, or choose "Double Time" in the 'Assign Real Tracks' dialog - I still get a garbled, artifact-ridden guitar solo.

There must be something else we're just not understanding here, huh?

BIAB 2010.5, Build 303

Bobby K.