Drone

A sustained note to tune your voice or strings against.

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How it works

Sing or play over the drone: you learn to hear when a note beats and when it is clean.
The just fifth (3:2) has no beating; the equal one is the piano's, slightly narrower.
With headphones you can use “Check your intonation” without the mic hearing the drone.

Everything happens on this device: no file is uploaded and nothing leaves the browser.