Instruments

It can be useful to re-color the keys on a traditional keyboard according to a 6-6 pitch pattern, coloring one wholetone scale black (C D E F# G# A#) and the other white (F G A B C# D#). This … Continue reading →

The Harpejji is an isomorphic string instrument. It is like a cross between an electric guitar and a Janko Keyboard. The pitch layout is similar to a Janko keyboard except that there are no duplicated rows; each row is a … Continue reading →

The instruments listed here and on the websites linked below follow the principle of isomorphism, the identical or similar appearance of intervals in all transpositions. This means they are key-neutral and scale-neutral. Isomorphism is also found in many alternative notation … Continue reading →

The Jankó keyboard with its “6-6″ layout was designed by Paul von Jankó in 1882. Because it has an isomorphic layout, each chord, scale, and interval has a consistent shape and can be played with the same fingering, regardless of … Continue reading →

The hexagonal Wicki-Hayden note layout has been used for concertinas, button accordions, and more recently for electronic midi instruments. An isomorphic layout, it follows the same principle of isomorphism that is found in many alternative music notation systems.   The … Continue reading →