Small potatoes when it comes to octave size discrepancies for piano. Just think of some of the differences us mallet percussion players have to deal with. Marimbas, xylophones and vibes all have various size key widths, anywhere from 1-1/4" to 2 or 2-1/2". A lot of key widths even vary within the instrument itself. Regards, Paul Paul Kupelian, RPT Tyler Hall SUNY Oswego Oswego, NY 13126
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