Well said Nigel.
Makes me think of all the Guitar Heros out there. Crank it up and let it rip.

John
I went to College with a girl who did have perfect pitch. In some ways it was a hinderance. Playing on a piano that was out of tune would drive her crazy. But wow, did she get straight A's in ear training.
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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