Korg opsix (2020)

Name: Korg opsix
Brand: Korg

A 37-key altered FM synthesizer released by Korg in 2020 with touch-sensitive keys, aftertouch, and USB/MIDI connectivity

Overview

The Korg opsix is an altered FM synthesizer from Korg, released in 2020. It has a 37-key keyboard with full-sized synth-action keys, and the keys are touch-sensitive and have aftertouch. The sound engine is Korg's Altered FM, a digital synthesis method known for metallic, bell-like, and evolving tones. The opsix belongs to a product family that includes the opsix SE and opsix module variants. All of them share the same core synthesis engine.

Specifications

Number of Keys	37
Key Weight	Synth
Key Size	Full
Touch Sensitive	yes
Aftertouch	yes
Polyphony	32
Sound Generation	Altered FM sound generator
Sounds Editable	yes
MIDI	yes
USB	yes
AC Power	yes
Batteries	no
Speakers	no
Audio Out	yes
Audio In	no
Sustain Pedal	yes
Soft Pedal	no
Expression Pedal	no

Design

The opsix uses Korg's FM sound generation. Frequency modulation gives it distinctive digital tones, such as metallic and bell-like sounds. The 37 full-sized, synth-action keys have touch sensitivity and aftertouch, built for expressive playing.

Product Family

The opsix is part of a family that includes the opsix, opsix SE, and opsix module - variants documented together in the same owner's manual.

Market Value

┌──────────────────────────────────────────────────────────────────────────┐
│ KORG OPSIX                                                      Nov 2026 │
├──────────────────────────────────────────────────────────────────────────┤
│ High      $600                                    Latest             $43 │
│ Median    $491                                    Trend                — │
│ Low       $23                                     Volume           ~5/mo │
├──────────────────────────────────────────────────────────────────────────┤
│   $600 ┤                                                                 │
│        │.                      .     .                   .    .          │
│        │                              .                      .    ..     │
│   $343 ┤                          .                         .            │
│        │                                                                 │
│        │                                                                 │
│        │                                                              .  │
│     $0 ┤                                     .                          .│
│        ├─────────────────────────────────────────────────────────────────│
│    vol │█                      █  █  ██      █           █  ███   ██  █ █│
│        └─────────────────────────────────────────────────────────────────│
│         2026-05                      2026-06                      2026-08│
└──────────────────────────────────────────────────────────────────────────┘