This may not suprise everyone here, but I found it remarkable: when transposing bass loops in RMX, they were almost artefact-free! You can't transpose an Apple Loop bassline without the sustains getting really wobbly in my experience (which sounds horrible), so: even more Kudos for RMX!!
It must be hard for Mr. Persing to stay modest, but he does it somehow ;-)
PS I'd like to automate the pitch transpose via MIDI Learn, but using a CC is a bit unpredictable for transpose steps-anyone have a better idea?