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Korg CA-40 Chromatic Tuner

Item: KGCA40

The ultra-reliable Korg CA40 is a chromatic tuner that is packed with features like a large, easy to see, LCD needle-style display, a built-in high sensitivity microphone to detect the pitch of an acoustic instrument, a stand on the back that lets you place the tuner on any surface, and an output jack, making it easy to check the tuning even while you perform.

In addition to providing both the accuracy of an LCD and the easy viewing of a needle-style meter, red and green LEDs are also provided to indicate pitch deviations, making tuning smooth and easy.

As if that wasn't enough for a low priced tuner, it also has a Sound Out function that produces a reference tone from the internal speaker and a calibration function over a range of 410-480 Hz.


Korg CA-40 Chromatic Tuner Features:

  • Larger and more easily readable
    high-precision LCD needle-style meter.
  • Wide detection range from A0 - C8.
  • Calibration function that accommodates a variety of concert pitches.
  • Sound Out function that lets you produce a reference tone from the internal speaker. The tuner will remember the pitch you select.
  • Bypass function.
  • Auto Power Off function saves the battery even if you forget to turn off the tuner.
  • Memory Backup function.
  • Approximately 85 hours of continuous use.


  • Scale 12-note equal temperament
  • Detection Range A0 (27.50 Hz) - C8 (4186.01 Hz): for a sine wave
  • Reference Tone C4 (261.63 Hz) - C5 (523.25 Hz): 1 octave
  • Tuning Modes:
    Meter mode (AUTO),
    Sound Out mode (MANUAL)
  • Calibration Range A4=410 Hz - 480 Hz (1 Hz steps)
  • Accuracy:
    Detection: +/- 1 cents or better
    Tone: +/- 1.5 cents or better
  • Connectors: INPUT jack (1/4" monaural phone jack)
  • Speaker Dynamic speaker (28 mm diameter)
  • Power Supply Two AAA batteries (3V)
  • Battery Life:
    Approximately 85 hours
    (Meter mode, continuous A4 input, zinc-carbon batteries)
  • Dimensions:
    3.94"(W) x 2.64" (D) x 0.67" (H)/
    100 (W) x 67 (D) x 17 (H) mm
  • Weight:
    0.19 lbs. (88 g)
    (Including batteries)


  • Two AAA Batteries

List price: $35.00

Price: $24.99

You Save: $10.01 (29%)

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KGCA40 - CA-40 Chromatic Tuner
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Rainbow Reviews:

Pete Fine


It's rare that I get to rave about a guitar accessory that sells for under $20! The Korg CA40 is a staple around here. Talk about "reliable"! I have literally sold many hundreds of them and I have yet ... Read More

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