That’s what makes the Yamaha Mega Voices so good. They are Midi loops that have been recorded using a Midi controller suitable for the instrument, (Guitar Mega voice = Guitar controller) with additional effects controllable by velocity and out of range notes.
This is also why style conversion software cannot make a good conversion with a Mega voice style to any other keyboard.

Bill
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English Riviera:
Live entertainment, Real Ale, Great Scenery, Great Beaches, why would anyone want to live anywhere else (I�m definitely staying put).