Name: Singing Tesla Coil(https://en.wikipedia.org/wiki/Singing_Tesla_coil)  is a form of plasma speaker, also known as zeusaphone, thoramin or musical lightning.

Wikidata Item: https://www.wikidata.org/wiki/Q7523623

Relation: The Singing Tesla Coil does not have close characteristics to normal electronic instruments(since it requires plasma to work) but it has ties to everyday speakers/wireless speakers.

Description: The instrument's Tesla Coil has been modified to produce musical tone by modulating the spark output. This results to a low fidelity square
wave, similar to the round reminiscent of an analog synthesizer.