Olaf — audio fingerprinting in the browser

Olaf listens to your microphone and matches what it hears, in real time, against a fingerprint index compiled into WebAssembly. Play the reference track out loud and the estimated playback position appears below.

idle

Estimated position in reference

0.00s

Match strength

–

Press “Start listening” to begin audio fingerprinting.

See what Olaf extracts: the spectrogram demo shows the spectrogram with the event points that make up the fingerprints.