Has anyone else experienced this? In NY Grand 274 if you turn the Tone shift dial to +1 the very bottom note 'A' first key on the left of the piano, stops sounding. Soon as you turn the tone shift back to zero it works again. Same on the Concert grand YF3. The more you turn the tone dial to the right the less notes play. Turn it to maximum +12 and the first 7 notes wont sound either.
Bug??