Free browser-based audio tools for finding and changing song key and BPM
Free per-app volume control for macOS with real VU meters, no audio driver required
Stage
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Founded
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Based in
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Pricing model
Freemium
Free
Pricing
Free plan includes Key & BPM Finder and Changer, Audio Cutter and Joiner, BPM Tapper and Metronome, Voice Recorder, and local processing tools with files saved for 6 hours. Plus plan: $9.90/month with 1,000 credits per month and files saved for 7 days. Pro plan: $19.90/month with 2,500 credits per m
Free
Key features
Detect song tempo, musical key, scale and Camelot code
Change key and BPM independently and export as WAV
Cut and join audio segments
Record voice and tap beat timing
Practice with online metronome
Remove vocals from songs
Split songs into instrument stems
Enhance audio quality with AI
Convert audio to editable MIDI
Per-app volume sliders and mute controls
Real VU meters per app and master
No audio driver installation required
Output device switcher for speakers, AirPods, and audio interfaces
Hide specific apps from the volume control list
Drag-to-reorder app arrangement with persistent settings
Automatic per-app level memory across sessions
In-app self-updating mechanism
What makes it different
Process audio locally in browser without uploading to servers
No file storage or account required for free tools
All free tools with privacy-first design
Direct export from browser without server processing
Free solution to a macOS gap that Windows provides natively
No system audio driver installation required
Real analog-style VU meters rather than decorative animations
Key & BPM Lab
AppVol