I'm not sure if the newer Yamaha keyboards have it, but my 3000 has a "Snyc Stop" button. Just lift your fingers from the keys and the keyboard stops until you touch the keys again. Problem solved.

Good information, though, Diki,

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.)