The Korg KR-55, introduced in 1979, was a significant step forward in rhythm machine technology, building on Korg’s experience with their earlier Mini Pops series. Unlike simple preset rhythm boxes of the time, the KR-55 combined sophisticated microprocessor storage with advanced synthesizer technology to create far more realistic percussion sounds and patterns.
Compact and weighing only 2 kg, it offered 48 preset rhythms covering rock, disco, funk, jazz, and Latin styles, with 24 of these developed from patterns contributed by top studio drummers. It also featured fill-ins, intros, and swing beat variations, giving users greater flexibility for live or studio use.
The Korg KR-55’s sound palette included 12 instrument voices such as bass drum, snare, hi-hat, cymbal, and toms, each synthesised to emulate real drum tones. It included a built-in six-channel mixer, allowing individual volume adjustment for each sound, and offered programmability to control external devices through its interface system. Creative additions such as footswitch-controllable intros and fills, as well as swing timing, made the Korg KR-55 more expressive than earlier rhythm units.
While it preceded the era of fully programmable drum machines like the Linn LM-1 and Roland TR-808, the Korg KR-55 found favour with artists seeking a more natural-sounding, dynamic backing unit. Its mixture of analogue synthesis and preset versatility made it a studio favourite, and it became part of the transitional generation of rhythm machines that bridged basic beat boxes and programmable drum machines.
Features
- 48 preset rhythms covering disco, rock, jazz, Latin, and funk styles
- 24 patterns developed by top studio drummers
- 12 analogue-synthesised drum and percussion sounds
- Built-in six-channel mixer with individual volume controls
- Intro, fill-in, and swing beat variations
- Programmable interface for controlling external devices
- Footswitch options for fills and intros
- Compact and lightweight design for portability
