DescriptionWicki-Hayden Piano WholeTone Color.png English: Diagram of the Wicki-Hayden note layout used on some button accordions and some isomorphic...
DescriptionWicki-Hayden-WholeTone-Piano-Color.png English: Diagram of the Wicki-Hayden note layout used on some button accordions and some isomorphic...
DescriptionWicki-Hayden WholeTone Piano Color 2.png English: Diagram of the Wicki-Hayden note layout used on some button accordions and some isomorphic...