Online Pitch Detector
Detect pitch and identify musical notes from any audio source.
Real-Time Note Detection
This tool will use the Web Audio API AnalyserNode to capture microphone input and detect the fundamental frequency in real time. See the detected musical note, frequency in Hz, and cents deviation instantly.
Features
- ✓ Real-time pitch detection from microphone
- ✓ Musical note identification (C, D, E, F, G, A, B)
- ✓ Frequency display in Hz
- ✓ Cents deviation from nearest note
- ✓ Waveform and spectrum visualization
- ✓ Octave detection (e.g., A4 vs A5)
About the Online Pitch Detector
Our free online pitch detector uses the Web Audio API's AnalyserNode to analyze microphone input and identify the fundamental frequency of any sound. It works with singing voices, musical instruments, and any tonal audio source.
The tool uses autocorrelation-based pitch detection to determine the dominant frequency, then maps it to the nearest musical note on the chromatic scale. The cents deviation indicator shows how sharp or flat the detected note is relative to standard tuning (A4 = 440Hz).
Whether you are a vocalist checking your pitch accuracy, a musician identifying notes by ear, or a student studying acoustics, this tool provides instant visual feedback. The real-time waveform display helps you see the shape of the sound being analyzed.