Editing Drum machine (section)

=== Rhythmicon (1930–1932) ===
[[File:Joseph Schillinger and the Rhythmicon.jpg|thumb|left|120px|[[Rhythmicon]] (1932) and [[Joseph Schillinger]], a music educator]]
In 1930–32, the innovative and hard-to-use ''[[Rhythmicon]]'' was developed by [[Léon Theremin]] at the request of [[Henry Cowell]], who wanted an instrument that could play compositions with multiple [[rhythmic unit|rhythmic patterns]], based on the [[harmonic series (music)|overtone series]], that were far too hard to perform on existing keyboard instruments. The invention could produce sixteen different rhythms, each associated with a particular [[Pitch (music)|pitch]], either individually or in any combination, including en masse, if desired. Received with considerable interest when it was publicly introduced in 1932, the Rhythmicon was soon set aside by Cowell.<ref>{{Cite web |date=2013-09-23 |title=The ‘Rhythmicon’ Henry Cowell & Leon Termen. USA, 1930 |url=https://120years.net/the-rhythmiconhenry-cowell-leon-termenusa1930/ |access-date=2025-01-17 |website=120 Years of Electronic Music |language=en-GB}}</ref>