OT-120 Orchestral Tuner

A needle-meter tuner with a built-in microphone and reference tones for tuning musical instruments.

Model / variant OT-120

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A closer look.

The OT-120 detects A0-C8 and provides adjustable A4 reference pitch from 349 to 499 Hz. Before buying: it uses two AAA cells (3V); the Japanese manual lists two test alkaline cells, while the product page lists the soft case. Confirm the seller’s included items. The KA181 AC adapter and contact microphone are separate options. Use only the specified compatible adapter and check its local input voltage and plug; no universal mains compatibility is implied. Instruments rich in overtones or with very short decay may not be detected even within the stated pitch range. Korg’s manual advises checking that an internet-purchased unit is intended for the country of use.

Product details

Model: OT-120
Detection range: A0-C8
Reference calibration: A4 = 349-499 Hz
Power: Two AAA batteries (3V); optional KA181 adapter
Dimensions: 74 x 120 x 36 mm

A product from a Japanese company; country of manufacture is not implied.

Sources & product information

Specifications may vary by market. Please confirm current details with the manufacturer.