From Wikipedia
The orthotonophonium is a free reed aerophone similar to a harmonium with 72 (sometimes 53) keys per octave, that can be played all diatonic key intervals and chords using just intonation. The instrument was created in 1914 by German physicist Arthur von Oettingen to advance his theories of harmonic dualism.
Frequently asked questions
What does the Orthotonophonium sound like?
Sources & credits
- Wikidata Q18026564 – CC0
- Wikipedia: Orthotonophonium – CC BY-SA 4.0
- Image by Museumsinsulaner – Public domain