Lufsy

Loudness Broadcast Norm Analyser.

Lufsy is a native macOS loudness checking app that analyzes audio/video files with bundled FFmpeg and validates them against multiple delivery norms.

Download

Downloads are available from the project website: lufsy.koman.app

Supported norms

• EBU R128
• ATSC A/85
• ARIB TR-B32
• Streaming (YouTube/Spotify) (-14 LUFS)
• Podcasts (-16 LUFS)

Each profile checks integrated loudness plus true peak, with profile-specific targets/tolerances. Some profiles also enforce a loudness range (LRA) limit.

How it works

• Add files by drag-and-drop or with the + toolbar button.
• Analyses run concurrently.
• Switching the norm dropdown re-evaluates existing measured files instantly (no re-scan needed).

Build and run

swift run

Beta update channel

Enable beta updates. Used for testing releases.

defaults write app.koman.lufsy updates.beta.enabled -bool true
# or false