Wheatstone's first telegraph had a chordal keyboard and a chordal readout. (Not surprising since Wheatstone came from a family that made accordions and concertinas!)
Other telegraphs were more piano-like.
This is a steno-telegraph designed by Michela. You hit two or three keys with each hand, and the result was printed as a symbol for a syllable or word. Michela's written symbols were quasi-phonetic like Korean:
Chordal machines survive in courtroom transcription, but again they're not trying to represent the chordal aspects of sound or grammar. They simply type a group of letters simultaneously, and the stenographer later visually translates the peculiar letter combinations into words.
In the digital world it's possible to restore Michela's concept. A regular keyboard won't do because it's strictly one output at a time, but it should be possible to connect a pressure-sensitive MIDI keyboard to produce not only phonic chords but grammar chords.Labels: defensible cases
The current icon shows Polistra using a Personal Equation Machine.