“The Stylophone is a miniature analog stylus-operated keyboard. Invented in 1967 by Brian Jarvis,[1] it entered production in 1968, manufactured by Dubreq. It consists of a metal keyboard made of printed circuit board and played by touching it with a stylus—each note being connected to a voltage-controlled oscillator via a different-value resistor—thus closing a circuit. The only other controls were a power switch and a vibrato control on the front panel beside the keyboard, and a tuning potentiometer on the rear. Some three million Stylophones were sold, mostly as children’s toys, but were occasionally used by professional musicians such as Rolf Harris and David Bowie.” (Wikipedia)
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