Korg OT-120 Orchestral Chromatic Needle Tuner

The Korg OT-120 Orchestral Tuner is a professional-grade chromatic tuning device designed specifically for orchestral, band, and classical musicians who require high-precision pitch control across a wide tonal range. Featuring a traditional needle-style meter combined with modern digital accuracy, it delivers highly responsive and reliable tuning performance for wind, string, and keyboard instruments.

Engineered for versatility and precision, the OT-120 supports multiple tuning modes, historical temperaments, and transposition functions, making it an essential tool for professional musicians, educators, and ensemble performers. Its vertical design and large display ensure excellent visibility in studio, rehearsal, and stage environments.

Wide-Range Orchestral Tuning

The OT-120 is capable of tuning across an extremely broad frequency range, making it suitable for virtually any orchestral instrument. From low brass to high strings, it provides stable and accurate pitch detection.

• Wide detection range from A0 (27.50 Hz) to C8 (4186 Hz)
• Ideal for wind, string, and keyboard instruments
• Supports ensemble and orchestral tuning environments
• High-precision pitch detection system

Needle-Type Precision Meter Display

Designed for professional accuracy, the OT-120 features a high-resolution analog-style needle meter combined with an LCD display. This provides both visual clarity and precise pitch feedback.

• High-precision needle-style tuning meter
• Fast and slow response modes for tuning preference
• LCD display showing calibration, note, and battery status
• LED indicators for enhanced visibility in low light

Multiple Tuning Modes and Temperaments

The OT-120 supports advanced tuning modes including automatic detection, manual tuning, sound mode, and Sound Back mode. It also includes historical temperaments for classical and period instrument tuning.

• Auto mode (SLOW, MEDIUM, FAST response options)
• Manual mode for targeted note selection
• Sound mode for reference tone playback
• Sound Back mode for ear-training and precision tuning
• Supports multiple historical temperaments

Transposition and Calibration Flexibility

The tuner includes comprehensive transposition support and calibration settings, making it suitable for a wide range of orchestral instruments and concert pitch standards.

• Transposition support for C, C#, D, Eb, E, F, F#, G, G#, A, Bb, B
• Calibration range: A4 = 349 Hz to 499 Hz (1 Hz steps)
• Designed for orchestral and concert pitch flexibility

Sound Back Function for Advanced Training

The Sound Back mode allows musicians to tune using both visual and auditory feedback. The tuner generates a reference pitch matching the detected note, helping develop pitch recognition skills and improving tuning accuracy.

• Built-in reference tone generation
• 5-octave sound output range (C2 to C7)
• Ideal for training and ensemble tuning
• Supports acoustic instruments via contact microphone (optional CM-200)

Professional Connectivity and Design

The OT-120 is designed with practical connectivity and long-term usability in mind, featuring input/output jacks and optional external microphone support for advanced tuning applications.

• 1/4-inch input and output jacks
• Supports external contact microphone (CM-200)
• Built-in microphone for acoustic detection
• Stable desktop stand design

Long Battery Life and Reliable Operation

Built for extended performance use, the OT-120 offers long battery life and optional AC power operation, making it suitable for rehearsals, teaching environments, and stage use.

• Up to 100 hours of battery operation
• Powered by 2 × AAA batteries
• Optional AC adapter support
• Energy-efficient design for long sessions

Key Features

• Professional orchestral chromatic tuner
• Wide tuning range (A0–C8)
• Needle-type precision meter display
• Auto, Manual, Sound, and Sound Back modes
• Multiple historical temperaments
• Advanced transposition settings
• Built-in reference tone generator
• Supports external contact microphone
• Long battery life up to 100 hours
• Designed for orchestral and ensemble tuning

Technical Specifications

• Product Type: Orchestral Chromatic Tuner
• Detection Range: A0 (27.50 Hz) – C8 (4186 Hz)
• Calibration Range: A4 = 349–499 Hz
• Accuracy: ±1 cent
• Reference Tone Range: C2–C7 (5 octaves)
• Modes: Auto, Manual, Sound, Sound Back
• Temperaments: Multiple historical tuning systems
• Inputs: 1/4-inch mono input
• Outputs: 1/4-inch mono output
• Power Supply: 2 × AAA batteries or AC adapter
• Battery Life: Approx. 100 hours
• Dimensions: 74 × 120 × 36 mm
• Weight: 193 g (with batteries)

The Korg OT-120 Orchestral Tuner remains a trusted professional tuning solution for orchestral musicians, offering exceptional accuracy, flexible tuning modes, and reliable performance in both stage and studio environments.

Weight: 0.193 kg