HVN’s
Pulse
Drop any file. Get tempo, key and drift before you open the session. Everything runs in your browser — nothing leaves your machine.
Drag & drop your audio file
or click to browse your files
File size limit: 50MB
Large files may take 10+ seconds to analyze on mobile. For best results, use MP3 files under 15MB.
How it works
Three simple steps to analyze your audio
Upload
Drag or click to select your audio file
Analyze
Audio analysis runs locally in your browser
Results
Get BPM, key, Camelot, energy & more
Features
Everything you need for harmonic mixing
BPM Detection
Accurate tempo analysis with confidence score
Musical Key
Detect key and relative Camelot notation
Energy Score
Measure track intensity (0-100)
Danceability
Calculate groove and beat consistency
Brightness
Spectral analysis for tonal character
Camelot Wheel
Visual harmonic mixing guide
Waveform Player
Preview with synced playback
Export JSON
Download analysis results
Privacy first
Your audio is analyzed locally in your browser. No files are uploaded to any server.