Real-time Music Key & BPM Analyser Tool

Tap Start and play music nearby.

Click Start Listening, allow microphone access, and play music near your device. Analysis updates continuously while listening.

Audio Gain Input Small Room · 3.0×

Adjust gain input for the space you're capturing audio from.

Idle.
Estimated Key
Estimated Tempo
BPM
Input level
Chroma profile (relative energy per pitch class)
How it works