This chromatic tuner for orchestras is equipped with high performance and functionality in a vertical form that is easy to hold and operate. Its needle-type meter is perennially popular for its excellent visibility. ■ Chromatic tuner

■ Needle type

■ Temperament: 12-tone equal temperament, Pythagoras, Mean Tone D#, Mean Tone E♭, Werckmeister III, Kirnberger III, Kellner, Vallotti, Young

■ Transposition range: C, C#, D, E♭, E, F, F#, G, G#, A, B♭, B

■ Measurement range: A0 (27.50Hz) - C8 (4186Hz)

■ Reference tone: C2 (65.41Hz) - C7 (2093Hz) 5 octaves, 2 volume levels

■ Tuning mode: AUTO (SLOW, MEDIUM, FAST), MANUAL, SOUND, SOUND BACK

■ Calibration function: A4=349-499Hz (1Hz step)

■ Measurement accuracy: ±1CENT

■ Sound accuracy: ±1.5CENT

■ Connection terminal: INPUT (mono standard), OUTPUT (mono standard), DC IN (9V)

■Power supply: 2 x AAA batteries (3V), or AC adapter (KA181)

■Battery life: Approximately 100 hours (alkaline batteries, meter mode (MEDIUM), no backlight, A4 continuous input)

■External dimensions: 74 (W) x 120 (D) x 36 (H) mm

■Weight: 193g (including batteries)

■Accessories: 2 x AAA alkaline batteries for operation check, suede-like soft case

■The OT-120 is a chromatic tuner for orchestras that is highly functional and easy to hold and operate in a vertical form. In addition to the needle meter that is popular for its good visibility, it is equipped with a dual display that also features a backlit LCD screen that clearly displays the remaining battery level, sound output level, calibration, key and temperament name, etc. The display, large dial for easy mode selection, and easy-to-press buttons are laid out in a vertical layout that is easy to hold, and the back is equipped with a stand that allows it to stand on its own. This needle-type meter tuner has a cool look with a luxurious silver aluminum panel and is packed with functions to support orchestral tuning.

■It can generate a reference tone over a wide range of five octaves from C2 (65.41Hz) to C7 (2093Hz). Two or more players can tune while listening to the reference tone at the same time. When the stand is in use, the speaker opening is not blocked, so you can check the reference tone at a louder sound. In addition, it is equipped with a function based on KORG's unique technology, Sound Back Mode. If you connect an instrument to the input jack with a separately sold contact microphone such as CM-100/CM-100L, the speaker will return the reference tone that is closest to the sound of the input instrument. The meter also works at the same time, so you can check the pitch with both your eyes and ears, which not only allows for more accurate tuning but is also ideal for training your sense of pitch. It also has a built-in microphone, so you can easily measure acoustic instruments.

■Long-life design that lasts more than 100 hours with two AAA batteries. It can also be used with an AC adapter (optional KA181, sold separately).