The TM-70T pairs a chromatic tuner with a metronome in one black pocket unit, and both halves run at the same time. Students on wind, strings and voice are the main audience. Guitars and ukuleles fall inside the detection range too, which makes it a sensible first buy for a household where several instruments are being learnt at once. One device, not two.
The meter and its range
Detection covers C1 to C8. That is low enough for tuba and double bass, with headroom for anything sitting above them. The needle on the display responds without noticeable lag, so a held note can be watched for wobble rather than simply checked at the start. Wind players lean on that. A CM-400 contact mic is sold separately for tuning in a noisy hall.
Transposing instruments
Alongside concert C, the readout switches to F, B flat and E flat. Players reading a transposed part then see the name printed in their own score instead of working it out. Beginners benefit most.
Marks for pure thirds
Third intervals are what give an ensemble away. The meter scale carries marks for the pure major and minor versions, and lining the needle up with them settles a chord that would otherwise sound sour, whether the players are a brass section or a group of singers. Which part adjusts depends on the piece.
Tuning by ear
Sound out mode plays a reference tone across three octaves, C3 to C6, through the speaker or your headphones. Sound back mode goes further. It generates the tone nearest to the pitch you are producing, while the meter shows the same reading, so eye and ear improve together. Note that the second mode needs a connection at the input or headphone jack.
The metronome side
Tempo runs from 30 to 252 beats per minute. Three ways to set it: pendulum steps like a mechanical unit, single increments, or tapping the switch in time with the music. Fifteen rhythm patterns are built in. They cover nought to nine beats, duplets, triplets, quadruplets and the versions with middle notes left out. When the tuner and metronome run together, the more complex subdivisions drop out, so check that before a lesson depends on them.
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.