An isomorphic keyboard is a musical device where a grid of notes is displayed to the user and the interval change between notes in constant for any given direction. The end result is the ability to move a musical passage between keys without learning a new fingering or spatial relation (transpositional invariance). What this means is that once you have learned a pattern, say a chord or a scale, that pattern is the same for all keys.
Songwriters benefit by discovering new melodies and musical relationships. Novices find it easy to learn to play. Experienced musicians are rewarded with an intuitive interface.
Musix is an iPhone/iPad application (on the app store) that allows people to both play an isomorphic keyboard as well as experiment with different layouts.
Rainboard - DIY Dynamic Rainbow Isomorphic Keyboard
We are working on building a hardware isomorphic keyboard that is easy to reconfigure for rapid layout testing.
For information on Layouts, History, Existing Hardware, Visual feedback, and external links check out the Research Page
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