What notes are used in drop d?

D2 A2 D3 G3 B3 E4, from the lowest string to the highest. Lower only the lowest string from E2 to D2. The other five strings stay at standard tuning.

Can I tune without allowing the microphone?

Yes. Press each string’s reference tone and compare it with your instrument by ear. The microphone is only needed for automatic pitch detection.

Why does the tuner show a different note immediately after I pluck?

The initial attack and nearby strings can confuse pitch detection. Mute the other strings, pluck one cleanly and read after the sound settles. Move a tuning peg in small steps.

Drop D Guitar Tuner

Lower only the lowest string from E2 to D2. The other five strings stay at standard tuning. This page opens on D2 A2 D3 G3 B3 E4, from the lowest string to the highest. Play a reference tone to tune by ear, or allow the microphone to see the nearest string and its pitch difference in cents. Pluck one string at a time and let it settle before reading.

Tune with your microphone

Your browser asks for permission first, because no page may listen without it. The samples are read in the page and dropped: nothing is recorded and nothing is uploaded.

Nothing is recordedNothing is uploadedThe stream closes when you stopNo account, nothing installed

Tuning

Reference

Input

The microphone is closed. Press Start to tune with it, or Play to hear a reference tone.

Why the browser asks permission first. A page cannot listen until you allow it, and the prompt is your browser's, not this site's. Allow it, play one string on its own, and the note should appear within a moment. The tuner reads the samples as they arrive and throws them away: there is no recording, and the stream closes the moment you press Listening or leave the page. Noise suppression and automatic gain are requested off, because a gate that mutes the room between notes, or a gain that rides a decaying string, gets between the detector and the string.

Strings in each tuning

Every frequency here is at A = 440, the reference chosen above, and is the exact pitch the Play button sounds. Any string is tuned the same way: play it, watch the bar, and turn the peg until the needle sits in the green. Sharp means the string is too tight, so tune down; flat means too loose, so tune up.

Tuning	Strings, low to high	Frequencies
Standard	E2 A2 D3 G3 B3 E4	82.4 Hz, 110.0 Hz, 146.8 Hz, 196.0 Hz, 246.9 Hz, 329.6 Hz
Drop D	D2 A2 D3 G3 B3 E4	73.4 Hz, 110.0 Hz, 146.8 Hz, 196.0 Hz, 246.9 Hz, 329.6 Hz
Half step down	Eb2 Ab2 Db3 Gb3 Bb3 Eb4	77.8 Hz, 103.8 Hz, 138.6 Hz, 185.0 Hz, 233.1 Hz, 311.1 Hz
Bass	E1 A1 D2 G2	41.2 Hz, 55.0 Hz, 73.4 Hz, 98.0 Hz

Accuracy. Pitch is measured from the raw microphone samples with autocorrelation, which resolves to about one cent for notes above 80 Hz in a quiet room; background noise and a decaying string widen that. Reference tones are exact. No audio is recorded or sent anywhere.

Common questions

What notes are used in drop d?: D2 A2 D3 G3 B3 E4, from the lowest string to the highest. Lower only the lowest string from E2 to D2. The other five strings stay at standard tuning.
Can I tune without allowing the microphone?: Yes. Press each string’s reference tone and compare it with your instrument by ear. The microphone is only needed for automatic pitch detection.
Why does the tuner show a different note immediately after I pluck?: The initial attack and nearby strings can confuse pitch detection. Mute the other strings, pluck one cleanly and read after the sound settles. Move a tuning peg in small steps.

Pitch is measured from the raw microphone samples with autocorrelation, which resolves to about one cent for notes above 80 Hz in a quiet room; background noise and a decaying string widen that. Reference tones are exact. No audio is recorded or sent anywhere.