Korg 707 (1987)

A 49-key FM performing synthesizer released in 1987, designed for live use with a front-panel performance editor.

Overview

The Korg 707 is a digital performing synthesizer released in 1987 (conflicting sources cite 1983–1987), built around a 4-operator FM synthesis engine. Marketed as a portable, performance-oriented instrument, it features a 49-key keyboard—equivalent to four octaves—and was intended for stand-up live use. It supports 8-voice polyphony in single mode and 4-voice in layer mode (conflicting sources claim 64-note polyphony), with multitimbral capability across 10 combinations. The front panel includes a dedicated "Performance Editor" for real-time control, and a 20-character, 2-line backlit LCD for navigation. Despite its compact size, it was positioned as a serious FM synth, not a toy, with warm digital sound generation and full MIDI connectivity.

Specifications

Keyboard	49-Key
Production Year	1987 (conflicting sources cite 1983–1987)
Synthesis Type	FM
Operators	4
Polyphony	8 voices (Single mode), 4 voices (Layer mode) (conflicting sources claim 64-note polyphony)
Display	20 characters / 2 rows, backlit
MIDI	MIDI CONNECTORS
Modes	Single, Layer, Combination (10 Combinations)
Sound Engine	Digital performing synthesiser

Design

The Korg 707 features a sleek, portable design with a numeric keypad and front-panel Performance Editor for live control. It was intended for stage use, with a layout optimized for quick access during performance. The number pad is known to suffer from wear over time, with some units showing faded numerals.

Market

Used prices for the Korg 707 vary widely, from $36.62 to $521.99 in excellent condition, with one unit found at a swap shop for $7. Common issues include worn number pad labels and the need for battery replacement to restore factory settings. Spare parts are occasionally available, and the synth remains functional decades later when maintained. A sample pack of 104 WAV files and original owner’s manual are accessible online.