Darklight Audio
Free Tools for Audio Professionals
No upload, no account, no catch. Everything runs in your browser. Built by engineers, for engineers.
A/B Audio Comparator
Compare two audio files with zero-delay switching. Drag and drop, instant playback, synced waveforms. Hear the difference.
Open tool → LiveDelay & Reverb Calculator
BPM-synced delay times — normal, dotted, and triplet values plus reverb pre-delay. Enter your tempo, get every timing you need.
Open tool → LiveBPM Tapper & Metronome
Tap along to any song to find the tempo, then play it back as a metronome. Time signature support, visual beat dots, and a direct link to the delay calculator.
Open tool → LiveLUFS / Loudness Analyzer
Drop an audio file to measure integrated LUFS, true peak, LRA, and see a loudness timeline. Check against Spotify, Apple Music, and broadcast targets.
Open tool → LiveKey Finder
Drop a track and detect the musical key. Uses chroma analysis and Krumhansl-Schmuckler profiles — plus estimated BPM and loudness. No upload to any server.
Open tool →Share audio with your clients
Track Lyst lets you create branded playlists with feedback, versioning, and downloads — all from your Dropbox or OneDrive.
Get started free