audioJS

Tuner

Play a note. The tuner shows the nearest pitch and how many cents you are off.

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press start, then play a note

Nothing is uploaded. Everything runs in this tab with @audio/pitch, @audio/note, @audio/mic.

A chromatic tuner with nothing to install

The tuner reads your microphone with @audio/mic, estimates pitch with @audio/pitch (YIN) and names the note with @audio/note. The needle shows cents from the nearest semitone; green means within 5 cents. Works on phones and laptops in any modern browser.

Standard tunings

Reference pitch

Most music uses A4 = 440 Hz. Orchestras often tune to 442 or 443, baroque ensembles to 415, and some players prefer 432. Set the field and every reading follows.

Questions

How do I tune a guitar with it?

Standard tuning is E2 A2 D3 G3 B3 E4. Play one string at a time, let it ring, and turn the peg until the needle sits in the green zone (within 5 cents).

Which instruments does it work for?

Anything that produces a clear pitch: guitar, bass, ukulele, violin, cello, brass, woodwinds, voice. Detection uses the YIN algorithm on a 4096-sample window.

Can I change the reference pitch?

Yes. A4 defaults to 440 Hz; set 432, 415 (baroque) or 442 to 443 (many orchestras).

Is my microphone recorded?

No. Audio is analysed in the tab and discarded. Nothing is stored or sent.

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