R128GAIN is an FFmpeg and SoX-based EBU R128 compliant loudness scanner for audio and video files. It helps you normalize the loudness of your audio and video files to the same level.
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This release provides four more environment variables for the command option: $TL - the track loudness relative to full scale; $TLDB - the track loudness relative to full scale in dB/LUFS; $AL - the album loudness relative to full scale; and $ALDB - the album loudness relative to full scale in dB/LUFS.