All-in-One Tuner, Metronome and Recorder, Mini USB 2.0 Port, Tap Tempo

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The black TMR-50 Tuner Metronome Recorder by Korg features the functionality of a wide-range tuner, an interactive metronome and a portable digital recorder, all in one pocket-sized practice tool. It's capable of recording up to 100 tracks of mono Linear PCM audio at 16-bit/44.1kHz resolution. The TMR-50 can even export recorded files to your computer via an onboard mini USB port. Additionally, the tuner, metronome, and recorder can be used simultaneously for even more effective training.

Key Features


  • The TMR-50 metre display method allows the pitch to be accurately and instantly shown without any time lag. Wind players will no longer experience the problem of their pitch changing before it can be displayed accurately.

The TMR-50's tuning detection range is wide, extending from C1 to C8, which covers the range of most instruments. The built-in high-sensitivity mic also allows accurate tuning of acoustic instruments such as guitar and ukulele.


  • 15 types of rhythms are built in, including time signature numerators from 0 through 9, duplets, triplets, triplets without the centre beat, quadruplets, and quadruplets without the centre beats. The TMR-50 has a wide tempo range of 30-252 beats per minute. The volume can also be adjusted, so you'll be able to use the metronome in any situation from personal practice in a small room to rehearsals in a studio.


  • The TMR-50 features Linear PCM recording and playback. It has a built-in mic, speaker and is able to automatically optimise the recording level as appropriate for the source volume. The onboard USB port allows connection to your computer, so if the recording memory fills up, you can relocate your data without losing it.

You can record with a metronome pre-count, record a "tempo sync track," or activate the tuner during playback to cheque your pitch. Also, the integrated Loop Play function will play a specified region of the recorded data repeatedly for closer examination.

Additional Features

Sound Out: Reference Tones

  • The Sound Out function produces a reference tone from the TMR-50's internal speaker or headphones. You can specify the reference tone in a three-octave range from C3 to C6, which covers a wide variety of instruments.

Sound Back: Nearest Reference Tone

  • The TMR-50 can detect and inform you of pitch discrepancies, also it serves as a tool to help you hear and produce the correct pitch. As the tuner detects pitch, it sounds the nearest reference tone while the metre shows the difference. The pitch is indicated in both visual and audible form, training your sense of pitch.

Beyond Equal Temperament

  • Incorrect pitch is particularly noticeable for harmonic intervals of a third, yet by slightly skewing the equal-tempered pitch, you can obtain a more pure-sounding harmony. The metre scale of the TMR-50 provides marks that indicate pure major and minor thirds relative to a given pitch. This is convenient for wind instruments, as well as vocal or a cappella practice.

Two Types of Tempo Step Pattern

  • When setting the tempo, you can choose either "pendulum steps" where the tempo will increment or decrement in the same numerical steps as on a mechanical metronome, or "full steps" which allows you to specify any tempo between 30 and 252 in one-step increments. In addition, you can also use the tap tempo input to specify the desired tempo simply by pressing a switch in time with the beat.

Enhanced Visibility

  • The large LCD display has a backlight that lets you adjust the brightness in two levels. This ensures excellent visibility, even when you're performing on a dim stage or in an orchestra pit.

Memory Backup and Auto Power-Off

  • When you turn off the power, the TMR-50 will remember the tempo, beat, rhythm, calibration, and reference tone settings you last specified. The Auto Power-Off feature will power the TMR-50 down after twenty minutes without any sound input.


Recording Format
PCM audio format, WAV format, 44.1 kHz/16-bit
Recording Time
Maximum approx. 20 minutes
(Internal memory size is 120 MB)
Number of Audio Tracks
Up to 100 tracks
12 note equal temperament
Detection Range
C1 (32.70 Hz) ~ C8 (4,186 Hz), using Sinae wave
Reference Tone
C3 (130.81 Hz) ~ C6 (1,046.50 Hz), 3 octave
Tuning Modes
Metre Mode (AUTO), Sound Out Mode (MANUAL), Sound Back Mode (AUTO)
Calibration Range
A4 = 410 ~ 480 Hz (1 Hz steps)
±1 cent
Sound Precision
±1 cent
Tempo Range
Quarter Note = 30 to 252 BPM
Tempo Setting
3 Types: Pendulum Step, Full Step, Tap Tempo
Beat Range
Total 10 beats: "0 to 9" as "Quarter-note" Rhythm
Rhythm Patterns
Duplets, triplets, triplets without the centre beat, quadruplets, and quadruplets without the centre beats
Tempo Accuracy
1/4" TS
Headphone Output
1/8" TRS stereo mini
USB Port
1 x USB mini type-B
Internal Speakers
1 x 1.1" (28 mm) dynamic speaker
Battery Requirements
2 x AAA (3.0V) batteries
Manganese batteries or alkaline batteries, NiMH
Battery Life
Recorder :
16 hrs, backlight: off
13 hrs, backlight: soft
11 hrs, backlight: auto
alkaline batteries, 20 min recording lengths

Tuner :
24 hrs, backlight: off
22 hrs, backlight: soft
20 hrs, backlight: auto
alkaline batteries, A4 continuous input

Metronome :
18 hrs, backlight: off
16 hrs, backlight: soft
14 hrs, backlight: auto
alkaline batteries, tempo 120, 4 beats, max volume
Dimensions (W x D x H)
4.37 x 3.23 x 0.71" (111 x 82 x 18 mm)
4.19 oz (119 g) including battery
Korg TMR-50 Tuner Metronome Recorder (Black)
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