Leigh Cross is a music enthusiast, scholar, and instrument builder whom Ben and I had the pleasure of meeting last year at a colloquium at Wright State. Leigh has designed and built a proportional pitch keyboard based on Ben Johnston’s fifty-three note, expanded just intonation scale as described in Ben’s paper, Scalar Order as a Compositional Resource (which can be found in his book Maximum Clarity). I had the pleasure of meeting up with Leigh again recently in his workshop in Vancouver, where I shot this video of Leigh explaining the keyboard.
Leigh is making this an open source project, as the keyboard needs development with the help of electricians, programmers, etc. If you would like to contact Leigh, please write to info[at] newdissonance.com and all inquiries will be passed along.