Les - You wrote: " Notes I had "cleaned up" fifteen minutes ago were now half a beat off. " Noting that it was Baldwin in a school situation, was the piano moved out for tuning and then pushed back? My early experiences with Acrosonics were that any change in floor contour (i.e. one leg higher than the other) would show up as out-of-tuneness across the bass-tenor break. Bill Maxim, RPT
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