Found at Techno Geek Toys, the Hymnotron: a device that looks like it could have been invented by George Ives (father of composer Charles), or Satan after a night of drinking Absinthe, whichever seems better to you.
“This instrument is designed to appeal to the devotée of spiritual music who is also familiar with binary math. In other words, it’s a niche product. The chords and inversions are selected by using combinations of the eight keys. When you select a chord the Hymnotron changes each note in the chord into just temperament to create intervals that are always perfectly in tune.”
A video demonstration found below. Contains some language, so be careful if you’re watching this in the parish office.
The Old Wolf has spoken.