Online Pitch Detector

Pitch Detector: Frequency & Note Finder

With this pitch detector you can instantly identify any musical note or frequency from a sound, instrument, or voice, right in your browser.

All you need is a device with a microphone (such as a laptop, smartphone, or tablet) or an external mic connected to your device.

How to Use the Pitch Detector

Follow these simple steps to detect notes and frequencies in real time:

1. Click the button to start detection and allow access to your microphone.
2. Play an instrument or sound you want to analyze.
3. View the result: The detected musical note and frequency will be displayed instantly.

You can confirm the result and work with the detected pitch by clicking the “Play this note in the tone generator” button.

Controls & Features

This frequency detection tool includes the following controls and features:

Detection Activation Button

This button activates the microphone and starts real-time pitch detection.

For best results, use the tool in a quiet environment and stay close to the sound source.

Notation

Choose how you want notes displayed. Select between standard English notation (C, D, E…) or Latin notation (Do, Re, Mi…).

Play Note in Tone Generator

When available, click the button to instantly play the detected note and frequency using the tone generator.

You can verify the detected pitch and play it using different waveforms (sine, square, triangle, and sawtooth).

Supported Instruments & Sounds

This pitch detector works with virtually any sound source, including:

• All types of musical instruments: piano, guitar, keyboards, violin, ukulele, and more.
• Voice: ideal for singing, vocal warm-ups, and ear training.
• Whistling: detect notes simply by whistling.
• Speaker playback: analyze frequencies from songs, virtual instruments, or audio tracks.

Microphone Privacy & Accuracy

Important information to keep in mind:

Privacy

Your privacy is fully protected: no audio leaves your device. Everything runs locally in your browser, nothing is recorded, stored, or transmitted.

Accuracy

Keep the following in mind when detecting very low or very high notes:

• Below G2: detection is generally reliable, but results depend on the sound source (it may be more challenging if not produced by a real instrument, voice, or high-quality speaker with strong bass) and your microphone quality.
• Above C7: frequency detection becomes more difficult in very high ranges, especially with standard microphones.

Aside from these extreme ranges, the tool delivers accurate real-time pitch detection on most devices and standard microphones.