Provided by: loudgain_0.6.8+ds-3_amd64 
NAME
loudgain - loudness normalizer based on the EBU R128 standard
SYNOPSIS
loudgain [OPTIONS] FILES...
DESCRIPTION
loudgain is a loudness normalizer that scans music files and calculates
loudness-normalized gain and loudness peak values according to the EBU R128 standard, and
can optionally write ReplayGain-compatible metadata.
loudgain implements a subset of mp3gain's command-line options, which means that it can be
used as a drop-in replacement in some situations.
loudgain will not modify the actual audio data, but instead just write ReplayGain tags if
so requested. It is up to the player to interpret these. (In some players, you need to
enable this feature.)
loudgain currently supports writing tags to the following file types:
FLAC (.flac), Ogg (.ogg, .oga, .spx, .opus), MP2 (.mp2), MP3 (.mp3), MP4 (.mp4, .m4a),
ASF/WMA (.asf, .wma), WavPack (.wv), APE (.ape).
Experimental, use with care: WAV (.wav), AIFF (.aiff, .aif, .snd).
OPTIONS
-h, --help
Show this help.
-v, --version
Show version number.
-r, --track
Calculate track gain only (default).
-a, --album
Calculate album gain (and track gain).
-c, --clip
Ignore clipping warnings.
-k, --noclip
Lower track/album gain to avoid clipping (<= -1 dBTP).
-K n, --maxtpl=n
Avoid clipping; max. true peak level = n dBTP.
-d n, --pregain=n
Apply n dB/LU pre-gain value (-5 for -23 LUFS target).
-s d, --tagmode=d
Delete ReplayGain tags from files.
-s i, --tagmode=i
Write ReplayGain 2.0 tags to files. ID3v2 for MP2, MP3, WAV and AIFF; Vorbis
Comments for FLAC, Ogg, Speex and Opus; iTunes-type metadata for MP4/M4A; WMA tags
for ASF/WMA; APEv2 tags for WavPack.
-s e, --tagmode=e
like '-s i', plus extra tags (reference, ranges).
-s l, --tagmode=l
like '-s e', but LU units instead of dB.
-s s, --tagmode=s
Don't write ReplayGain tags (default).
-L, --lowercase
Force lowercase 'REPLAYGAIN_*' tags (MP2/MP3/MP4/ASF/WMA/WAV/AIFF only). This is
non-standard, but sometimes needed.
-S, --striptags
Strip tag types other than ID3v2 from MP2/MP3 files (i.e. ID3v1, APEv2). Strip tag
types other than APEv2 from WavPack/APE files (i.e. ID3v1).
-I 3, --id3v2version=3
Write ID3v2.3 tags to MP2/MP3/WAV files.
-I 4, --id3v2version=4
Write ID3v2.4 tags to MP2/MP3/WAV files (default).
-o, --output
Database-friendly tab-delimited list output (mp3gain-compatible).
-O, --output-new
Database-friendly new format tab-delimited list output. Ideal for analysis of files
if redirected to a CSV file.
-q, --quiet
Don't print scanning status messages.
RECOMMENDATIONS
To give you a head start, here are my personal recommendations for being (almost)
universally compatible.
Use loudgain on a »one album per folder« basis; standard RG2 settings but lowercase
ReplayGain tags; clipping prevention on; strip obsolete tag types from MP3 and WavPack
files; use ID3v2.3 for MP3s; store extended tags:
$ loudgain -a -k -s e *.flac
$ loudgain -a -k -s e *.ogg
$ loudgain -I3 -S -L -a -k -s e *.mp3
$ loudgain -L -a -k -s e *.m4a
$ loudgain -a -k -s e *.opus
$ loudgain -L -a -k -s e *.wma
$ loudgain -I3 -L -a -k -s e *.wav
$ loudgain -I3 -L -a -k -s e *.aiff
$ loudgain -S -a -k -s e *.wv
$ loudgain -S -a -k -s e *.ape
I've been happy with these settings for many years now. Your mileage may vary.
For easy mass-tagging, there is a bash script called rgbpm included with loudgain, which
follows above recommendations. You can make a copy, put that into your personal ~/bin
folder and modify it to whatever you need.
BUGS
loudgain is maintained on GitHub. Please report all bugs to the issue tracker at
https://github.com/Moonbase59/loudgain/issues.
AUTHORS
Matthias C. Hormann mhormann@gmx.de
Alessandro Ghedini alessandro@ghedini.me
COPYRIGHT
Copyright (C) 2019 Matthias C. Hormann mhormann@gmx.de (versions > 0.1)
Copyright (C) 2014 Alessandro Ghedini alessandro@ghedini.me (v0.1)
This program is released under the 2 clause BSD license.
September 2019 LOUDGAIN(1)