Tuner

A microphone-based chromatic tuner — play a note and see how close you are, live.

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Not listening

FlatSharp

How to use the tunerHit Start Tuning and allow microphone access, then pluck a single string and let it ring. The needle centers and turns green when you’re in tune (within 5 cents); it leans left for flat, right for sharp. In standard tuning, low to high, the open strings are E, A, D, G, B, and E again — the label under the note name tells you which one you’re closest to.