Korg Studio Pro Tuner

The OT-120 chromatic tuner is intended for orchestral instruments, packing precise performance and sophisticated functionality in a vertical design that’s easy to hold and operate. It features a dual-display, an easy-to-see needle-type indicator and a backlit LCD screen that shows the battery life, sound output level, calibration, key and note name. Additional design features include a large dial that makes it easy to select the desired mode, soft-touch buttons and a rear-mounted stand that lets the unit stand by itself. A sophisticated silver aluminum panel contributes to its sleek, new look


SKU: OT120Categories: Accessories, Tuners & MetronomesTags: Gifts Under $100
Product price
Additional options total:
Order total:
12 equal tempered, Pythagorean, Werckmeister III, Vallotti, Mean Tone Eb, Kirnberger III, Young, Mean Tone D#, Kellner
Transpose Range
C, C#, D, Eb, E, F, F#, G, G#, A, Bb, B
Detection Range
A0 (27.50 Hz) – C8 (4186 Hz)
Reference Tone:
C2 (65.41 Hz) – C7 (2093 Hz), five octave, two-step volume control
Tuning Modes
A4 = 349 – 499 Hz (1 Hz step)
Detection Accuracy
± 1 cent
Tone Accuracy
± 1.5 cent
INPUT (1/4” phone jack), OUTPUT (1/4” phone jack), DC IN (9 V)
Power Supply
Two AAA batteries, or AC adapter (separately sold)
Battery Life
approx. 100 hours (with alkaline batteries, in meter mode (MEDIUM), A4 tone continuously input, without backlit)
(W x D x H)
74 x 120 x 36 mm / 2.91” x 4.72” x 1.42”
193 g (including batteries) / 6.81 oz. (including batteries)
two alkaline AAA batteries for checking operation, a suede-tone soft case
Weight .8125 lbs
Dimensions 15 × 10 × 5 in