A new keyboard without keys
Paul S. Rosberger · IEEE Spectrum · 1967
The advantages of the electronic medium and those of a simple congruent instrument keyboard have been combined to produce the Binary Touchboard described in this article. Basically, it operates by translating a finger touch into a switching signal that activates a note-sounding device. The simplified fingering is especially advantageous in such areas as atonal music, jazz, and what might be characterized as ``spatial music.''