A musical instrument designed to produce harmonic or choral effects, possibly an electric or mechanical variant.
From choral + -eon (musical instrument suffix, as in 'harmoneon'), suggesting a device that creates choral sounds.
The '-eon' suffix was Victorian-era composers' favorite way to name new inventions—theremin, harmoneon, choraleon—they were all trying to mechanically create what vocalists did naturally, which tells you something about how technology always chases human artistry.
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