The TM-70T is a combined tuner and metronome in white, and the two halves can run at the same time. Detection spans C1 to C8, a needle appears on the LCD, and a transpose setting covers instruments written in F, B flat or E flat. Small enough for a case pocket.
Reading pitch across the range
Coverage from C1 to C8 reaches low notes, tones thick with overtones, and acoustic instruments such as guitars and ukuleles. The needle responds without lag, so a long note on a wind instrument shows its wobble instead of averaging it out. Accuracy holds to within one cent, and calibration moves between 410 and 480 Hz in single hertz steps.
Written in one key, sounding in another
Transposing players read one note and produce a different one, which makes a plain chromatic tuner awkward to use. Settings for F, B flat and E flat sit next to concert C here. Beginners can then tune straight from the page.
Locking in the harmony
Marks on the meter scale show where pure major and minor thirds fall, and tuning to them rather than to dead centre helps a chord settle inside an ensemble. That interval is the one that gives a section away. Choirs and a cappella groups can work the same way. Which note gets adjusted depends on the music in front of you.
Tuning by ear
Sound out mode plays a reference tone from the small speaker or into headphones, spanning three octaves from C3 to C6. A second setting listens to what you play and generates the nearest matching note while the meter shows your actual pitch. Eye and ear together catch what either misses alone. It doubles as a listening exercise.
Setting the tempo
Tempo can be set three ways: pendulum steps in the manner of a mechanical unit, single increments anywhere from 30 to 252 bpm, or tapping the switch in time with the music. Fifteen rhythms take in time signatures from 0 to 9 beats along with duplets, triplets, quadruplets and the versions that leave the middle notes out. Timing holds to within 0.3 per cent. Some of the busier patterns are unavailable while the tuner runs alongside.
Power and size
Two AAA cells drive it, and with the backlight off the tuner alone runs for roughly 250 hours. The body measures 107 x 72 x 18 mm and weighs 79 g without batteries. The CM-400 contact microphone is sold separately and clips onto the instrument for tuning in a noisy room.
See it in action
Specifications
| Scale | 12-note equal temperament |
|---|---|
| Detection range | C1 (30.47 Hz, A4=410 Hz)-C8 (4566.56 Hz, A4=480 Hz) for a sine wave |
| Reference Tone | C3 (121.89 Hz, A4=410 Hz)-C6 (1141.64 Hz, A4=480 Hz), 3 octaves |
| Tuning function | Meter, sound out, sound-back, transpose |
| Calibration Range | A4 = 410 Hz-480 Hz (in units of 1 Hz) |
| Detection accuracy | Better than ±1 cent |
| Sound accuracy | Better than ±1 cent |
| Tempo Range | Quarter note = 30-252 beats per minute (bpm) |
| Tempo settings | Pendulum step, full step, tap tempo |
| Time signatures | 0-9 beats, duples, triplet shuffle, quadruplets, quadruplets without the center beats |
| Tempo accuracy | ±0.3 % |
| Connections | Input jack (3.5 mm monaural mini-phone jack, unbalanced), headphones jack (3.5 mm stereo mini-phone jack) |
| Speaker | Dynamic speaker (23 mm) |
| Power Supply | Two AAA batteries (3 V, zinc-carbon or alkaline) |
| Battery Life | When using the tuner only Approx. 250/150/85 hours (backlight: Off/Soft/Auto, A4 continuous input, using alkaline batteries) When using the metronome only Approx. 200/130/75 hours (backlight: Off/Soft/Auto, tempo of 120, four beats, maximum volume, using alkaline batteries) |
| Dimensions (W x D x H) | 107 x 72 x 18 mm / 4.21” x 2.83” x 0.71” |
| Weight | 79 g / 2.79 oz (without batteries) |
| Included Items | Quick Start Guide |
| Accessories (separately sold) | CM-400 contact mic |
Specifications from Korg. Appearance and specifications are subject to change without notice.