Pitch Detector & Tuner
Detect your vocal pitch or tune your instrument in real-time using your microphone.
Advanced Audio Settings
Tune Your Instrument or Voice with the Pitch Detector
The Pitch Detector is a real-time browser-based tuner that helps you identify the exact pitch of your voice or instrument. Using your device’s microphone, it measures the fundamental frequency (F0) in Hertz (Hz), converts it to the nearest musical note, and displays a live tuning indicator that shows whether you’re flat, sharp, or in tune.
Whether you’re tuning a guitar, practicing vocals, checking violin intonation, or tuning a ukulele, the Pitch Detector provides instant visual feedback without requiring a dedicated tuner app. All audio processing happens locally in your browser, keeping your microphone input private throughout the session.
How the Pitch Detector Works
Getting started only takes a few steps.
- Select a tuning mode such as Chromatic, Guitar, Ukulele, or Violin.
- Click Start Microphone.
- Allow microphone access when your browser requests permission.
- Play or sing a single sustained note.
- Watch the detected note, frequency, and tuning indicator update in real time.
- Fine-tune your instrument until the tuning needle centers on In Tune.
The Pitch Detector uses an autocorrelation algorithm to estimate the fundamental frequency of a single note. After identifying the frequency, it converts the value into the nearest musical note and calculates the cent offset, allowing the tuning needle to indicate whether the note is flat, sharp, or correctly tuned.
If you’re learning how pitch relates to musical notes, What Is Audio Frequency? and Hz to Note Converter provide additional background.
Understanding Your Results
As audio is detected, several values update continuously.
| Result | Description |
|---|---|
| Detected Note | The nearest musical note to the incoming sound. |
| Detected Frequency | Current pitch measured in Hertz (Hz). |
| Tuning Needle | Indicates whether the note is flat, sharp, or centered on pitch. |
| Cent Offset | Shows the exact tuning difference from the target note. |
| Target Note Frequency | Standard frequency for the detected musical note. |
When the tuning needle reaches the center position, your note is closest to the selected tuning reference.
Instrument-Specific Tuning Modes
The Pitch Detector includes several tuning modes for different instruments.
- Chromatic Mode detects any musical note.
- Guitar Mode focuses on standard guitar string tuning.
- Ukulele Mode targets standard ukulele strings.
- Violin Mode is optimized for standard violin tuning.
Unlike Chromatic Mode, instrument-specific modes compare your pitch against the expected string notes. For example, when using Guitar Mode, playing an incorrect note does not cause the tuner to switch freely between all chromatic notes. Instead, it evaluates how close the detected pitch is to the intended guitar string, making tuning faster and more consistent.
If you’re interested in improving tuning accuracy, Delay Time Calculator and Audio Latency Test can help you understand timing and monitoring performance during recording sessions.
Advanced Settings
The Advanced Audio Settings allow you to customize how the tuner responds.
- A4 Reference Pitch lets you change the standard tuning reference from the default value to alternative concert pitches, such as 432 Hz.
- Noise Gate Threshold helps prevent quiet background sounds, breathing, or room noise from triggering false pitch detections.
For the best results:
- Tune in a quiet room.
- Play or sing one note at a time.
- Hold notes steadily for more stable detection.
- Position your microphone close to the sound source.
Because the detector analyzes monophonic audio, it is designed for single notes rather than full chords.
To learn more about reducing unwanted delays while recording, What Is Good Audio Latency?, How to Reduce Audio Latency, and Audio Interface Latency provide helpful guidance.
Privacy and Browser Processing
The Pitch Detector processes audio entirely within your browser. Your microphone stream is used only for real-time pitch analysis and is never recorded or transmitted to any external server. Simply stop the microphone when you’re finished tuning to end the session.
Frequently Asked Questions
Can the Pitch Detector tune chords?
No. The detector is designed for monophonic audio and works best when analyzing one note at a time.
What does the tuning needle show?
The tuning needle indicates whether the detected pitch is flat, sharp, or centered on the target note using the calculated cent offset.
Can I tune different instruments?
Yes. The Pitch Detector includes Chromatic, Guitar, Ukulele, and Violin tuning modes.
What is the A4 reference pitch used for?
It changes the tuning standard used during note calculations. The default is 440 Hz, but alternative values such as 432 Hz are also supported.
Is my microphone audio recorded?
No. All pitch analysis runs locally within your browser, and your audio is never stored or transmitted.