Usually all keyboards make a little sound when played in the quiet, although my PSR-S900's are pretty silent...perhaps the PA2XPro the reviewer was playing was an early production model....who knows?

How about the PA2XPro's style fills Graham....were they glitchy? Smooth?

Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.