Nigel,

The only voice in Yamaha's keyboards that seems to suffer from phase cancellation is their grand piano. It has been my experience, and the experience of many, many others that the summing of other, popular voices does NOT have a phase cancellation problem.

Get the hook, wink

Gary cool
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)