KORG GA-50 - Guitar/Bass Tuner with Enlarged Display, Built-in Microphone, and 135 Hours of Battery Life

KORG GA-50 - Guitar/Bass Tuner with Enlarged Display, Built-in Microphone, and 135 Hours of Battery Life

The KORG GA-50 is KORG’s recommended portable tuner for guitarists and bassists looking for accuracy and simplicity in a pocket-sized package. Its new LCD display enlarges the note name and string number for immediate readability, while the needle-type meter responds quickly and is accurate to within ±1 cent . It features dedicated guitar and bass modes , with support for 7-string guitars and 5- or 6-string basses , as well as flat tunings down to −5 semitones .

In addition to the built-in microphone for acoustic instruments, the GA-50 offers a 1/4" (mono) input and output for daisy-chaining with your amp and tuning during performance without disconnecting the signal. Sound Out mode generates a reference tone through its 21mm dynamic speaker , ideal for string placement or ear training. Its design is optimized for the music stand with a fold-down foot and anti-slip system, and it has approximately 135 hours of battery life on two AAA batteries, with a low-battery indicator, settings backup memory , and automatic shut-off .

Main features

• Enlarged display with note name and string number in the center for quick reading.
• Guitar and Bass modes with support for 7 strings (guitar) and 5/6 strings (bass), including Low-B and High-C.
• 12-note chromatic detection in equal temperament, with accuracy of ±1 cent .
• Flat tuning up to −5 semitones (semitone steps).
• Sound Out mode with an audible reference tone via the built-in speaker; output one octave higher on guitar and two octaves higher on bass.
• Connectivity : 6.35mm INPUT and OUTPUT (mono) for tuning connected to the amplifier.
• Built-in microphone and compatibility with KORG CM-200 contact microphone (optional).
• Stable music stand design , foldable foot and sliding battery cover.
• Backup memory (retains calibration and Sound Out) and auto shut-off after 20 minutes without audio input.
• Approximate autonomy 135 h (zinc-carbon batteries), low battery indicator.
• Compact dimensions : 100 × 67 × 17 mm; weight : 81 g (with batteries).

Benefits for the musician

• Instant Read : Note/string-centric interface minimizes errors during live performance or rehearsal.
• True versatility : covers everything from standard to drop tunings and modern extensions (7 string, Low-B/High-C).
• Silent or stage use : tune with an internal microphone, with a cable, or in a chain thanks to the THRU output (OUTPUT).
• Ear Training : Sound Out mode makes it easy to fit new strings and tune by ear.
• Minimal maintenance : long battery life, battery indicator and automatic shut-off.

Use cases

• Rehearsal and live : Connect your guitar/bass to the INPUT and your amp to the OUTPUT to monitor your tuning between tracks without muting your signal.
• Lessons and study : Sound Out mode for interval practice and initial tuning after changing strings.
• Acoustics : tuning via built-in microphone or with CM-200 contact microphone (optional) in noisy environments.

Frequently Asked Questions

• Does it work with 7-string guitars and 5/6-inch basses? Yes, it displays the string number and note on the screen and supports flat tunings down to −5 semitones.
• Can I tune while playing through the amp? Yes, use the OUTPUT jack to link the tuner between the instrument and the amp.
• Are batteries included? No. Requires 2 x AAA batteries (not included).
• Does it have a built-in microphone? Yes; when you insert a jack into INPUT, the internal microphone is automatically muted.
• What is the accuracy? ±1 cent on the tuner measurement.

Description for projects

Portable 12TET guitar/bass tuner with Meter and Sound Out modes; ±1 cent accuracy; flat tuning −1 to −5 semitones; detection: Guitar B1–B6, Bass B0–B5; string reference: Guitar 7B, 6E, 5A, 4D, 3G, 2B, 1E; Bass LB, 4E, 3A, 2D, 1G, HC; built-in microphone; Ø21 mm dynamic speaker; INPUT and OUTPUT connectors 6.35 mm (mono, unbalanced); 2×AAA power supply; approx. 135 h battery life (zinc-carbon, Meter mode, A4 continuous); auto-off 20 min; backup memory; dimensions 100 × 67 × 17 mm; weight 81 g.