Not listening
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Press Start, then pluck a string.
The tuner finds the string automatically. Tap a string to lock it, for example when a new string is far off pitch.
Tuning tips
Pluck firmly but not hard, then let the note ring for a second: every string starts slightly sharp and settles. Tune up to the note; if you overshoot, drop below it and come back up. Re-pluck every few seconds as the string fades.
Phone and laptop microphones hear the low strings weakly. Hold the device close to the soundhole or amp, or play the 12th-fret harmonic: the tuner folds it back onto the open string.
Microphone blocked? How to allow it
- Chrome or Edge: select the site controls icon left of the address, open Site settings, set Microphone to Allow, then reload. On Android, also allow the microphone for Chrome itself in Android settings.
- Firefox: select the microphone or permissions icon in the address bar, clear the block, then reload.
- Safari on Mac: Safari → Settings → Websites → Microphone, then choose Allow or Ask for this site.
- iPhone or iPad: tap the page menu () in the address bar → Website Settings → Microphone.
- Also check that your operating system lets the browser use the microphone.
Accuracy: readings are shown to 1 cent and count as in tune within 2 cents. Real strings drift by a cent or two as they ring, so this matches what the ear and a good clip-on tuner can use.