BPM & Key Finder
ANALIZADOR ESPECTRAL
MOTOR DSP: v2.4⚡ Extracción multibanda y análisis cromático solo en el navegador
RUEDA CAMELOT
La mezcla armónica alinea tonalidades para transiciones fluidas.
Misma tonalidadej. 8A → 8A (mezcla perfecta)
Impulso de energía+1 en sentido horario: ej. 8A → 9A
Caída de energía-1 en sentido antihorario: ej. 8A → 7A
Cambio de modoA ↔ B: ej. 8A ↔ 8B
ABOUT THIS TOOL
Free Online BPM & Key Finder for DJs and Producers
Detect tempo (BPM), musical key, and Camelot notation from any audio file — entirely in your browser. Built for harmonic mixing prep: find compatible keys and tempos before your next set or production session.
How it works
- 01Upload an audio file (MP3, WAV, FLAC, AAC, OGG) or pick one from Library after sign-in.
- 02Essentia.js analyzes beat onsets and chromagram in WebAssembly — BPM (with half/double toggle) and key appear in seconds.
- 03Use the Camelot mixing guide to plan harmonically compatible transitions with adjacent wheel codes.
Key features
- Browser-local analysis — your audio stays on your device
- BPM detection with half/double tempo correction
- Musical key plus Camelot (Open Key) notation
- Harmonic mixing cheat sheet for DJ transitions
Common questions
Musictool uses Essentia.js — the same MIR algorithms used in research and production tools, compiled to WebAssembly. Most commercial tracks return stable BPM and key; live recordings or heavily processed audio may need manual half/double BPM adjustment.