Pitch Detector Online
Professional real-time audio pitch detector with frequency graph and cents deviation gauge.
Reference Pitch Tone Generator
Pitch Detector Tips & Usage Notes
- Allow microphone permissions when prompted by your browser.
- Sing or play a sustained note close to your microphone for smooth pitch tracking.
- Use the Live Pitch History Graph to monitor pitch stability, vibrato, and intonation accuracy over time.
What Is a Pitch Detector Online?
A Pitch Detector Online is a browser-based audio analysis tool that detects the exact pitch of your voice or instrument in real time. It measures the incoming sound through your device’s microphone, identifies the closest musical note, displays its frequency in Hertz (Hz), shows how many cents the pitch is above or below the target note, and visualizes pitch movement with a live scrolling history graph.
Unlike a basic tuner, this tool is designed for pitch analysis, making it useful for singers, vocal coaches, instrumentalists, music students, and ear training exercises. It can detect frequencies from approximately 65 Hz to 4200 Hz, includes an adjustable noise sensitivity threshold, A4 calibration (432–446 Hz), a reference sine wave tone generator, and a real-time pitch stability graph for monitoring vibrato and intonation. All audio processing runs 100% locally in your browser using the Web Audio API, so your microphone audio is never recorded, uploaded, or stored.
How to Use the Pitch Detector
Using the pitch detector is quick and straightforward.
- Click Scan Pitch Detector Microphone and allow microphone access when prompted.
- Leave the default noise sensitivity threshold unless you need to filter more background noise.
- Keep the A4 calibration at 440 Hz, or adjust it if you use another concert pitch.
- Sing or play a single sustained note into your device’s microphone.
- Watch the detected note, measured frequency, cents indicator, and live pitch history graph update in real time.
- Continue holding the note to observe pitch stability, vibrato, and intonation accuracy over time.
If you’re learning musical notation, our guide on how to read violin sheet music explains note names and pitch relationships that are useful when interpreting the detector’s results.
Understanding Your Results
The pitch detector provides several measurements that work together to analyze your performance.
| Display | Meaning |
|---|---|
| Detected Note | Closest musical note (A4, C#3, Eb5, etc.) |
| Measured Frequency | Live pitch displayed in Hertz (Hz) |
| Target Frequency | Expected frequency for the detected note |
| Cents Indicator | Difference between your pitch and the target note |
| Pitch History Graph | Displays pitch movement over time |
| Input Level | Indicates microphone signal strength |
A reading close to 0 cents means your pitch is accurately centered on the detected note. Negative values indicate the pitch is flat, while positive values indicate it is sharp. The detector considers pitches within approximately ±3 cents to be in tune.
Unlike a traditional tuner that only shows the current note, the scrolling graph lets you see how your pitch changes over time, making it much easier to evaluate vibrato, sustained notes, and overall intonation.
Real-Time Pitch History Graph
One of the most powerful features of this tool is the real-time pitch history graph.
Instead of displaying only the current note, the graph continuously plots your detected pitch as you sing or play. This allows you to:
- Monitor pitch stability during sustained notes.
- Observe natural vibrato patterns.
- Identify unwanted pitch fluctuations.
- Improve intonation accuracy.
- Compare different singing or playing techniques.
Because the graph scrolls continuously while the microphone is active, you can immediately see how consistently you maintain pitch throughout a performance or practice session.
Noise Threshold and A4 Calibration
The detector includes two advanced settings that improve accuracy.
Noise Threshold
The noise sensitivity threshold filters quiet background sounds before pitch analysis begins.
A lower threshold detects softer sounds but may respond to background noise, while a higher threshold ignores quiet environmental sounds and focuses on stronger signals.
A4 Calibration
The default concert pitch is A4 = 440 Hz, which is the international tuning standard used by most musicians.
If needed, you can adjust the calibration anywhere between 432 Hz and 446 Hz. Changing the A4 value automatically recalculates the target frequencies for every detected note while maintaining equal temperament.
To learn more about concert pitch, visit our guide on violin tuning standard.
Tips for More Accurate Pitch Detection
For the best performance:
- Use the detector in a quiet environment.
- Analyze only one voice or instrument at a time.
- Hold sustained notes instead of short sounds.
- Position your device close to the sound source.
- Adjust the noise threshold if background sounds trigger unwanted detection.
- Ensure microphone permission has been granted.
If your goal is tuning rather than pitch analysis, you can also use the Chromatic Tuner for real-time instrument tuning. After improving pitch accuracy, practicing with the Online Metronome helps develop both rhythm and intonation. Working through violin scales is another excellent way to strengthen pitch recognition and ear training.
Privacy and Technical Limitations
This Pitch Detector Online performs all audio processing locally inside your browser using the Web Audio API and Canvas 2D API. Your microphone audio is analyzed in memory only and is never uploaded, recorded, stored, or transmitted.
Detection accuracy depends on microphone quality, browser compatibility, background noise, and the use of a single monophonic sound source. The detector is designed for one note at a time and cannot independently track multiple simultaneous notes from polyphonic audio.
Frequently Asked Questions
What is the difference between a pitch detector and a tuner?
A tuner is mainly designed to help you tune an instrument to a target note. A pitch detector provides additional analysis by displaying the detected frequency, cents deviation, and a live pitch history graph that helps evaluate intonation and vibrato.
What does the pitch history graph show?
The graph continuously displays how your pitch changes over time, making it easier to analyze pitch stability, vibrato, and sustained-note accuracy.
Can the detector analyze chords or multiple notes at once?
No. The detector is designed for monophonic audio and analyzes one voice or instrument at a time.
Should I adjust the noise threshold?
The default setting works well for most situations. Increase the threshold if background noise is causing false detections or decrease it if you need to detect very quiet sounds.
Is my microphone audio uploaded or stored?
No. All pitch detection runs locally in your browser using the Web Audio API. The tool does not record, upload, or store microphone audio.