Yeah a more portable Theoryboard would be good too – though i like the large format, it will fit very well. I definitely see the Theoryboard for me as both a performance instrument (where portability would be nice) and as a composition tool where a larger more comfortable format is nice. I think you might have identified a follow on product for Irijule, Peoplemuver.
Something occurred to me recently – a different mode, as it were, that i think would be useful for me. I’'d like to be able to switch modes where the left side keyboard is melody (instead of chord) just like the right hand keyboard. Then when both sides are in the same key, you could more easily play counterpoint, with a little practice to get some of the counterpoint rules down.
And then if you could assign different keys to the separate melody sides, then instead of counterpoint, you could play in bitonality. Bitonality in music theory is music made of two melodies in different keys. By choosing different keys you get different effects. Some key combinations will sound dissonant and harsh others very sweet and consonant yet outside standard tonality. Examples of great composers among many that used bitonality are Stravinsky, Bartok, and Milhaud – but it also has been used in prog-rock from the 70’s and 80’s, and modern jazz.
Improvisation in two different keys (bitonality) on a standard keyboard can be a real challenge – not that it would become easy in this proposed implementation on the Theoryboard – only more playable.