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Guitar tuner

Tune a guitar through your microphone across eleven tunings, or play per-string reference tones, with a cents needle and A4 calibration.

Detected note

Press Start tuning, allow the microphone, then pluck a string. The tuner names the note and how many cents it sits from pitch.

Reference tones

The low strings on dropped tunings sound close to what small laptop microphones stop hearing. If Drop C or Open C will not register, tune that string by ear against its neighbor, or touch the string lightly above the twelfth fret and pluck there: the harmonic sounds an octave higher, and the tuner reads that fine.

Detection follows the string's fundamental through its first harmonics, capped at 5 seconds per reference tone. It names one note at a time and assumes a single ringing string; it will not parse full chords, track vibrato, or correct for intonation problems in the guitar itself.

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Guitar tuner

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