Examples;The clavioline is an electronic keyboard instrument, a forerunner to the analog synthesizer.
It was invented by Constant Martin in 1947. It consists of a keyboard and a separate amplifier and speaker unit. The keyboard usually covered three octaves, and had a number of switches to alter the tone of the sound produced, add vibrato, and provide other effects. Several models were produced by different companies; among the more important were the Standard, Reverb, and Concert models by Gibson and Selmer in the 1950s. The Bode 6-octave model employed octave transposition.
In England the Jennings Organ Company's first successful product was the Univox, an early self-powered electronic keyboard based on the Selmer Clavioline
Pre-cursor to MGMT or better than a B3?