From the short online demo it seems the variations changes according to your playing. Puts more control on the player and not the machine. Need to see more in depth reviews.
The one thing that scares me is the weight, 37 lbs.
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Bill in SC --- Roland BK9 (2) Roland BK7M, Roland PK5 Pedals, Roland FP90, Roland CM30 (2), JBL Eon Ones (2) JBL 610 Monitor, Behringer Sub, EV mics, Apple iPad (2) Behringer DJ mixer