mp3gain -r -t -1 -k *.mp3
MP3Gain on Linux: A Comprehensive Guide to Normalizing Audio Volumes** mp3gain linux
MP3Gain is designed to work with MP3 files, but it can also handle other formats, such as WAV and AAC. The tool is available on multiple platforms, including Linux, Windows, and macOS. mp3gain -r -t -1 -k *