The ST1K is a KORG tuner designed specifically for analog and modular synthesizers, instruments that usually require special care in tuning their oscillators. Compact in size, lightweight and easy to carry, it has a high-visibility 3D meter , and is able to detect frequencies with great precision with a tolerance of only +/- 0.1 cents. The ST1K is an instrument that integrates KORG's legendary experience in the fields of tuners and synthesizers.

ST1K Highlights

• Circuitry optimized for tuning analog and modular synthesizers.


• High visibility 3D Visual Meter.


• Ultra-precise tuning only ±0.1 Cent tolerance.


• Three Meter display modes in addition to note name display.


• Compact and slim design, easy to carry.

Analog synthesizers are difficult instruments to tune, as their oscillator signals can sometimes fluctuate as the circuitry adjusts to temperature changes, or the oscillators themselves need to be calibrated with microtonal tunings. These requirements require reliable tuning, both in the studio and on the go. The ST1K allows for extremely precise tuning with just ±0.1 cents of tolerance and features a large CMD LCD display that provides a clear and visually appealing readout of your tuning, aligning with the aesthetics of modular and analog synthesizers. It also includes a high-sensitivity microphone, expanding its use to a wider range of instruments. At just 83 grams, this incredibly compact and lightweight tuner is perfect for musicians and performers on the go.

Circuitry optimized for tuning analog synthesizers.

The ST1K's input circuitry is optimized to provide stable tuning for modular synthesizers by adapting high-voltage levels without interference from LED-induced noise and with particular attention to maintaining sound quality.

High visibility 3D Visual Meter.

The large display shows the names of the notes, with LEDs making it easy to perceive frequency fluctuations, while the 3D Meter allows for highly precise tuning with a tolerance of only ±0.1 cents, which is problematic when using needle meters.

Ultra-precise tuning

Professional recording and stage performances always require perfect tuning, the ST1K is capable of extremely high-precision tuning with only ±0.1 cent tolerance in Strobe mode, managing to highlight even the smallest intonation errors.

Three Display Modes of Display Meter

Three display modes of the LED Meter can be selected to suit individual needs. "Regular Mode" is the standard one, "Strobe" and "Half Strobe" which indicate frequency shifts base on the direction and speed of the Meter flow, making it easy to detect even the smallest errors.

Compact and slim design

The ST1K's compact and slim cabinet still houses a large LCD display that makes it easy to read the data detected in any operating condition, making the tuner very practical to transport.

ST1K Technical Specifications

• Stairs: 12


• Detection range: A0 (27.50Hz) to C8 (4186Hz)


• Calibration of the Chorister: from A4=436 to 445 Hz (1 Hz step)


• Detection accuracy: ±0.1 cents


• Connectors: INPUT (standard monaural), OUTPUT (standard monaural)


• Selector:POWER / DISPLAY / CALIB


• Power supply: 2 x AAA batteries (manganese: R03, alkaline dry cell: LR03, or nickel-hydrogen rechargeable battery) Battery life: Approximately 50 hours of continuous use (AAA manganese dry cell batteries, continuous input A440, Display Mode: regular)


• Dimensions: 99 (W) x 65 (D) x 16 (H) mm


• Weight: 83 g (including batteries)


• Accessories: Φ3.5-Φ6.3 mini to standard jack connection adapter

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• * Product specifications and appearance are subject to change without notice for improvement.