mp3gain-express
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Description:
Port of MP3Gain and AACGain
Type: Cask  |  Latest Version: 2.5@0  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  formulae.brew.sh
Category: Multimedia
Tags: audio mp3 aac normalization volume macos
Install: brew install --cask mp3gain-express
About:
MP3Gain Express is a native macOS port of the popular MP3Gain and AACGain command-line tools. It provides a graphical user interface for analyzing and adjusting the perceived volume of MP3 and AAC audio files without re-encoding. The tool applies track gain for consistent volume across a library or album gain to preserve relative dynamics.
Key Features:
  • Lossless volume adjustment without re-encoding
  • Support for both MP3 and AAC formats
  • Native macOS graphical user interface
  • Batch processing capabilities for entire libraries
Use Cases:
  • Normalizing volume across a music library for consistent playback
  • Preparing audio files for mobile devices or portable players
  • Adjusting album gain to maintain intended dynamic range
Alternatives:
  • mp3gain – Command-line version requiring terminal usage, lacks GUI
  • Sound Normalizer – Commercial tool with broader format support but more complex interface
Version History
Detected Version Rev Change Commit
Aug 5, 2025 2:21pm 2.5 0 VERSION_BUMP 66e329ba