Pitch Detector

Use the Online Pitch Detector to identify the musical note and frequency of a sound through your microphone. Sing or play one steady tone, and the live display shows its pitch in Hertz, the nearest musical note and how closely the sound matches that note.

The tool is useful for checking a sung note, practicing pitch matching, identifying a note by ear and screen, or tuning one instrument note at a time. It listens to the sound currently reaching your microphone; it does not require you to upload an audio file.

If your goal is to measure your complete low-to-high singing span, use the homepage’s Vocal Range Finder after identifying your comfortable endpoint notes.

How to Use the Pitch Detector

1. Prepare a clear sound

Choose a quiet room and turn off music, videos, fans and other sounds near the microphone. The detector works best with one voice or instrument producing one note at a time.

Keep the microphone at a comfortable, consistent distance. Avoid placing it so close that the audio distorts, and avoid testing from so far away that room noise becomes louder than the intended note.

2. Start pitch detection

Select Start Pitch Detection and allow microphone access when your browser asks. The status and signal-level areas should respond when the microphone receives sound.

Begin with an easy, steady note. Sing a clear vowel, hum, or play a single instrument tone. Let the initial attack pass, then hold the center of the sound long enough for the display to settle.

3. Read the note, frequency and pitch accuracy

The main panel shows the detected musical note and its frequency in Hertz. The supporting fields show the nearest note, pitch accuracy and signal level.

If you are matching a target note, make a small pitch adjustment and watch the accuracy indicator move toward the center. Singers can adjust gradually rather than pushing more volume. Instrumentalists can tune one string or note, allow the reading to settle, then make a small mechanical adjustment before checking again.

4. Stop, copy or reset the reading

Select Stop when you are finished using the microphone. Use Copy Result to save the displayed pitch information. Select Reset to clear the current result and begin another focused check.

For consistent comparisons, keep the room, microphone position and type of sound similar between attempts.

How to Read the Pitch Detector Display

Each part of the interface answers a different question.

Display	What it tells you
Musical note	The detected note name and octave, such as A3, C4 or F♯4.
Hz	The measured frequency of the current sound in cycles per second.
Nearest Note	The equal-tempered musical note closest to the detected pitch.
Pitch Accuracy	Whether the sound is centered on the nearest note or sits to its flat or sharp side.
Signal Level	Whether the microphone is receiving a usable audio signal.
Main meter	A visual guide for adjusting the sound toward the center of the nearest note.

The letter gives the pitch class and the number gives its octave. A4 is a different pitch from A3 even though both share the letter A. For help interpreting note labels and octave numbers, read the vocal range notes guide.

Pitch, Frequency and Musical Notes

Pitch is how high or low a sound is perceived. Frequency is the physical repetition rate of a periodic sound, measured in Hertz. A frequency of 440 Hz means the waveform repeats approximately 440 times per second.

In a common modern tuning reference, A4 is set to 440 Hz. Moving up one octave doubles frequency, so A5 is 880 Hz. Moving down one octave halves it, so A3 is 220 Hz. The University of New South Wales note-frequency reference explains this equal-tempered relationship and its frequency formulas.

Western equal temperament divides an octave into 12 semitones. Each semitone is divided into 100 cents, giving 1,200 cents per octave. Because musical pitch is logarithmic, the same number of cents represents the same musical interval in any octave even though the difference in Hertz changes.

The detector converts the measured frequency to the nearest note. A sound can therefore be labeled A4 while sitting slightly below or above A4’s reference frequency. The pitch-accuracy display helps show that difference.

What Flat, Centered and Sharp Mean

When you aim for a note, the accuracy indicator can be interpreted in three practical zones:

• Flat: The detected pitch is below the center of the nearest note. Raise it slightly if that note is your target.
• Centered: The pitch is close to the reference center for the displayed note.
• Sharp: The detected pitch is above the center. Lower it slightly if that note is your target.

“Sharp” and “flat” in this context describe tuning relative to the displayed note. They do not necessarily change the nearest-note label immediately. If the pitch moves far enough toward the next chromatic note, the label can change.

Natural sung and acoustic-instrument tones are rarely motionless. Breath, vibrato, bow pressure and finger movement can make the display move. Look for a stable center rather than trying to freeze every instant of a living sound.

If you want to calculate the exact musical distance between two known notes, use the Semitone Calculator.

A Reliable Three-Part Reading Method

A single sustained sound has an attack, a stable center and a release. The middle portion usually provides the most useful pitch reading.

1. Start the sound naturally. Ignore a brief jump at the first instant, especially with a breathy vocal onset, plucked string or struck note.
2. Hold the center steadily. Watch for a note and frequency that remain reasonably consistent for a moment.
3. Release normally. Do not judge the pitch from the fading tail, where the signal may become too weak or noisy.

Repeat the sound two or three times. If the detector returns the same note and a similar central position, you have stronger evidence than one momentary reading.

This method is especially useful when checking the endpoint of a vocal range, matching a reference pitch or tuning an instrument with a strong initial transient.

Using the Pitch Detector for Singing

Identify the note you are singing

Sing one steady vowel and read the note name and octave. If the label changes quickly, simplify the sound: reduce background noise, use a cleaner onset and hold one pitch instead of sliding.

The detector tells you what pitch reached the microphone. It does not rate vocal tone, breath support, resonance or musical expression.

Practice matching a target note

Play or hear a reference note, then sing it. Use the nearest-note label to confirm the correct note and the accuracy meter to adjust toward the center.

Make small changes. If you are far from the target, first match the correct note and octave; then refine whether the pitch is flat or sharp. Repeating short, comfortable attempts is more useful than forcing a long note.

Check the stability of a held note

Hold a comfortable pitch and observe whether the note label remains the same. Small movement in the accuracy display is expected. Larger repeated drifts may help you notice where the sung pitch tends to rise or fall during the sustain.

This live detector shows the current note rather than a full historical pitch graph. Save or copy representative results if you want simple checkpoints.

Confirm a vocal-range endpoint

Use the detector to verify a particular note, then use the focused Lowest Note Test or High Note Test to track that endpoint through a dedicated session. Use only comfortable, repeatable notes when calculating your complete range.

Using the Pitch Detector as an Instrument Tuner

The detector can act as a general chromatic tuner for a single sustained instrument note. It is useful for strings, wind instruments, brass, keyboards and other sources that produce a clear pitch.

For a stringed instrument:

1. Play one string by itself.
2. Let the attack settle and read the nearest note.
3. Confirm that it is the intended string note and octave.
4. Adjust the tuning mechanism in a small amount.
5. Play the string again and move the pitch-accuracy indicator toward the center.

Mute other strings when possible, because sympathetic vibration can introduce competing pitches. For a wind or bowed instrument, sustain one note with consistent breath or bow pressure.

The tool is designed for one prominent note at a time. A chord contains several pitches, so the detector may switch among components or emphasize one harmonic. Use separate chord-analysis software when you need to identify an entire chord.

Why the Detected Note May Jump

A musical sound contains a fundamental frequency and harmonics above it. The balance of those components changes with vowel, instrument, technique and microphone position. A pitch detector estimates the repeating pattern most likely to represent the fundamental, but the reading can occasionally shift.

Common causes include:

• More than one voice or instrument sounding at once.
• Background music, fans, traffic or room echo.
• A note that slides continuously instead of settling.
• A breathy, creaky or noisy vocal sound.
• Strong vibrato near the boundary between notes.
• Microphone distortion from excessive input level.
• A strong harmonic being interpreted as the fundamental.

An octave error occurs when the detector displays a note one octave above or below the intended fundamental. If a result looks implausible, repeat the sound cleanly, try a different vowel or microphone distance and compare several attempts before accepting it.

Improve Pitch-Detection Accuracy

Use these conditions for a clearer reading:

• Test in a quiet room.
• Produce one note at a time.
• Hold the note steadily for a moment.
• Keep a consistent microphone distance.
• Avoid clipping or distortion from excessive loudness.
• Let plucked or struck attacks settle before reading the center.
• Mute other strings and sound sources.
• Repeat unexpected results.

The signal must be strong enough to analyze without overwhelming the microphone. Louder is not automatically more accurate. A clean, stable tone at a comfortable level is usually more useful.

Troubleshooting the Online Pitch Detector

Microphone access is blocked

Check this website’s microphone permission in your browser settings. Confirm that the intended input device is selected, then reload the page and select Start Pitch Detection again.

If the page is open inside another app, try a regular browser. You can also test the microphone in another application to determine whether the issue is the browser permission or the input device.

Signal Level stays on Waiting

Confirm that pitch detection has started and that the microphone is active. Try a comfortable sustained note at a normal volume. Check the operating system’s input selection and microphone level if the display still does not respond.

The note alternates between two labels

Your sound may be close to the midpoint between two notes, sliding in pitch or changing because of vibrato. Hold a steadier center and reduce competing noise. If you are tuning, adjust slowly and let the display settle after each change.

The displayed octave seems wrong

Repeat the sound with a clean onset and a steady center. Try changing the vowel, instrument articulation or microphone position. An octave error can occur when a strong harmonic or subharmonic is treated as the fundamental.

The reading moves even when the note sounds steady

Small movement is normal in natural sounds. Check whether the nearest-note label remains consistent and whether the meter stays near the same area. If it jumps widely, improve the signal-to-noise ratio and check for distortion or another sound source.

For broader help with browser and microphone problems, use the site’s Troubleshooting guide.

Pitch Detector vs Vocal Range and Voice Type Tools

Choose the tool that matches the question you want to answer.

Your question	Best tool
What note or frequency am I producing right now?	Pitch Detector
What are my lowest and highest comfortable singing notes?	Vocal Range Finder
What broad classical category does my measured range support?	Voice Type Test
How many semitones separate two known notes?	Semitone Calculator

The Pitch Detector focuses on the current sound. It does not automatically determine a complete vocal range or classify a voice from one note.

Microphone Processing and Privacy

The tool states that audio is analyzed locally in your browser. A secure HTTPS connection and microphone permission are required so the browser can receive the live signal.

Select Stop when you finish. For the site’s current explanation of microphone processing and stored data, review the Data Security page.

Frequently Asked Questions

What note am I singing?

Start the detector, sing one steady pitch and read the musical note and octave in the main display. Let the onset settle before using the reading, and repeat the note if the label jumps.

What does Hz mean in a pitch detector?

Hertz measures frequency in cycles per second. A higher stable frequency corresponds to a higher musical pitch. An octave increase doubles the frequency; an octave decrease halves it.

What is pitch accuracy?

Pitch accuracy describes how the detected sound sits relative to the center of the nearest musical note. The indicator helps show whether the pitch is flat, centered or sharp.

Can I use this tool as a tuner?

Yes. Play one instrument note at a time, confirm the intended note and octave, then adjust until the pitch-accuracy indicator moves toward the center. Retest after every small adjustment.

Can a pitch detector identify chords?

This tool is designed for one prominent pitch at a time. With a chord, it may display one component, a changing note or a harmonic. It does not provide a complete chord name.

Why does the detector show the right letter but the wrong octave?

The tool may have interpreted a harmonic or subharmonic as the fundamental. Repeat the note with a clean, sustained tone, reduce noise and compare several readings.

Is a pitch detector the same as a perfect-pitch test?

No. A pitch detector measures an incoming sound through the microphone. A perfect-pitch or absolute-pitch test evaluates whether a person can identify or produce notes without first hearing a reference.

Does the tool record my audio?

The interface states that audio is analyzed locally in the browser for live detection. Review the site’s Data Security page for its current data-handling details, and stop microphone access when you finish.