Can I tune without a microphone?

Yes. Press each note chip to hear a two-second reference tone, then compare one instrument string at a time by ear. Only automatic pitch detection needs microphone permission.

Why is the tuner comparing with a different string?

Nearest string follows the closest open-string target. A heavily mistuned string can be nearer another target. Choose Selected string, then select the intended string to hold that comparison. Nearest chromatic note instead uses the detected note’s equal-tempered target.

What should I do about an unstable or missing reading?

Mute other strings, pluck one string clearly and let its attack settle. Too quiet means insufficient microphone level; No clear pitch means no strong accepted period in the current samples. Noise and strong harmonics can shift the displayed octave. The tool analyses one pitch, with a nominal 30–1200 Hz range; it does not separate a chord into its strings.

Can I use the 12th-fret harmonic of the low string?

Yes. Choose Selected string, select that string and enable the harmonic option. Both the target and its reference tone move one octave up. Turn the option off before comparing an open string. A clean fundamental is still dependent on your microphone or interface.

Six String Bass Tuner

This six-string bass preset includes both low B0 and high C3. It differs from a six-string guitar: the notes and octaves are B E A D G C. This page opens on B0 E1 A1 D2 G2 C3. Compare one string at a time with a generated reference tone by ear, or allow the microphone for pitch detection. The string chips and frequency table use your selected A = 432, 440 or 442 reference. Selected string keeps a fixed target, and Nearest chromatic note uses the detected note’s own cents. Stop or leaving the page releases the microphone; no audio is recorded or uploaded.

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: Tuning

Reference

Input

Compare with
Reference / selected string

The cents bar follows the nearest open string in the selected tuning. Use Selected string to keep a fixed target.

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 listed frequency here is at A = 440, the reference chosen above, and sets the generated reference tone. Physical playback also depends on your device clock. 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 measured pitch is higher than the target; flat means lower. Ukulele high G is re-entrant, so its first listed string is not the lowest pitch.

Tuning	Strings in instrument order	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
Whole step down	D2 G2 C3 F3 A3 D4	73.4 Hz, 98.0 Hz, 130.8 Hz, 174.6 Hz, 220.0 Hz, 293.7 Hz
Open D	D2 A2 D3 F#3 A3 D4	73.4 Hz, 110.0 Hz, 146.8 Hz, 185.0 Hz, 220.0 Hz, 293.7 Hz
Open C	C2 G2 C3 G3 C4 E4	65.4 Hz, 98.0 Hz, 130.8 Hz, 196.0 Hz, 261.6 Hz, 329.6 Hz
C standard	C2 F2 Bb2 Eb3 G3 C4	65.4 Hz, 87.3 Hz, 116.5 Hz, 155.6 Hz, 196.0 Hz, 261.6 Hz
Baritone B standard	B1 E2 A2 D3 F#3 B3	61.7 Hz, 82.4 Hz, 110.0 Hz, 146.8 Hz, 185.0 Hz, 246.9 Hz
Double drop D	D2 A2 D3 G3 B3 D4	73.4 Hz, 110.0 Hz, 146.8 Hz, 196.0 Hz, 246.9 Hz, 293.7 Hz
Five-string bass	B0 E1 A1 D2 G2	30.9 Hz, 41.2 Hz, 55.0 Hz, 73.4 Hz, 98.0 Hz
Six-string bass	B0 E1 A1 D2 G2 C3	30.9 Hz, 41.2 Hz, 55.0 Hz, 73.4 Hz, 98.0 Hz, 130.8 Hz
Bass drop D	D1 A1 D2 G2	36.7 Hz, 55.0 Hz, 73.4 Hz, 98.0 Hz
Bass drop C	C1 G1 C2 F2	32.7 Hz, 49.0 Hz, 65.4 Hz, 87.3 Hz
Bass D standard	D1 G1 C2 F2	36.7 Hz, 49.0 Hz, 65.4 Hz, 87.3 Hz
Ukulele high G	G4 C4 E4 A4	392.0 Hz, 261.6 Hz, 329.6 Hz, 440.0 Hz
Ukulele low G	G3 C4 E4 A4	196.0 Hz, 261.6 Hz, 329.6 Hz, 440.0 Hz
Baritone ukulele	D3 G3 B3 E4	146.8 Hz, 196.0 Hz, 246.9 Hz, 329.6 Hz

Accuracy. Autocorrelation resolves synthetic steady tones above 80 Hz to within one cent. Microphone noise, harmonics and a decaying string can widen or shift readings. Reference tones use equal-tempered target frequencies; playback depends on the device clock. No audio is recorded or sent anywhere.

Common questions

Which notes does this preset use?: B0 E1 A1 D2 G2 C3, in the displayed instrument-string order. This six-string bass preset includes both low B0 and high C3. It differs from a six-string guitar: the notes and octaves are B E A D G C.
Can I tune without a microphone?: Yes. Press each note chip to hear a two-second reference tone, then compare one instrument string at a time by ear. Only automatic pitch detection needs microphone permission.
Why is the tuner comparing with a different string?: Nearest string follows the closest open-string target. A heavily mistuned string can be nearer another target. Choose Selected string, then select the intended string to hold that comparison. Nearest chromatic note instead uses the detected note’s equal-tempered target.
What should I do about an unstable or missing reading?: Mute other strings, pluck one string clearly and let its attack settle. Too quiet means insufficient microphone level; No clear pitch means no strong accepted period in the current samples. Noise and strong harmonics can shift the displayed octave. The tool analyses one pitch, with a nominal 30–1200 Hz range; it does not separate a chord into its strings.
Can I use the 12th-fret harmonic of the low string?: Yes. Choose Selected string, select that string and enable the harmonic option. Both the target and its reference tone move one octave up. Turn the option off before comparing an open string. A clean fundamental is still dependent on your microphone or interface.

Autocorrelation resolves synthetic steady tones above 80 Hz to within one cent. Microphone noise, harmonics and a decaying string can widen or shift readings. Reference tones use equal-tempered target frequencies; playback depends on the device clock. No audio is recorded or sent anywhere.