Early 1980s

The Sohler Keyboard

A symmetrical keyboard retrofit for any instrument. According to the brochure, only three fingering patterns needed to be learned to master this instrument.

1989

SGW Co. Solderstat

A handy wrist-strap solder dispenser. Accessory options included a static-control elastic strap and a coiled grounding cord.

1990

Sensor Frame Corporation VideoHarp

An optically scanned MIDI controller that “converts moving images of the fingers into music” using a Motorola MC68000-based microcomputer.

1994

Riday Systems T-91

A portable, alternative MIDI controller with a unified fingering keyboard designed to make it equally easy to play in every key.

1994

Simmons TurtleTrap

This multipad MIDI controller offered ten trigger zones and seven inputs for external controllers.

1990s

Jim Corrigan C2P2

A moderno MIDI controller that featured sliding finger levers and fret controllers, as well as many other buttons.