rsgain

ReplayGain 2.0 tagging utility

rsgain (really simple gain) is a ReplayGain 2.0 tagging utility for Windows, macOS, and Linux. rsgain applies loudness metadata tags to your files, while leaving the audio stream untouched. A ReplayGain-compatible player will dynamically adjust the volume of your tagged files during playback. rsgain is designed with a "batteries included" philosophy, allowing a user to scan their entire music library without requiring external scripts or other tools. It aims to strike the perfect balance between power and simplicity by providing multiple user interfaces.