ReplayGain 1.0.0 Beta 5

ReplayGain is a amaroK script to support replaygain tags.
ReplayGain
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ReplayGain is a amaroK script to support replaygain tags.

Using replaygain will make all your songs have the same perceived volume, making unnecesary to adjust the volume on each song change (specially if they are from different albums/artists).

Files supported:

· vorbis ogg: needs vorbis-tools (uses vorbiscomment)
· mp3: needs mp3gain or aacgain
· aac (mp4/m4a): needs aacgain
· needs flac (uses metaflac)
· musepack (mpc): needs musepack utilities (uses replaygain)

How to use:

First you need to analyze all your song files with the corresponding utility. The utility will write some tags to the file which will be used to correct the playing volume.

Once a file is tagged, the script will be able to read such tags and it will update the volume as needed so all files/albums sound equally loud.

If a file doesn't have replaygain tags it will be played at 0 dB+pregain (dB stands for decibel, search wikipedia or google if you don't know what it is)

Tagging your files:

Vorbis ogg:
vorbisgain -arfs *

mp3 (using mp3gain):
find -type d -exec sh -c "mp3gain "{}"/*.mp3" ;

mp4 and mp3 (using aacgain):
find -type d -exec sh -c "aacgain "{}"/*.mp[34]" ;

mpc:
find -type d -exec sh -c "replaygain --auto "{}"/*.mpc" ;

How it works:

The script will adjust the volume slider for you on each song change. You should use your soundcard's mixer to adjust the volume, but you can change the pregain too.
The script is calibrated with gstreamer, xine and arts engines.

Crossfade is supported, so the volume changes slowly when crossfading. You have also the option of sudden or smooth volume change when crossfade is disabled in amarok.

The 0 dB point is set at 55% volume, but a default +6 dB pregain is applied. The pregain is just the volume reference level, that is, how loud a song with no need of volume adjustment will play.

The pregain can be changed in the configure dialog, or if configured to do so, by moving the volume slider. But beware that if the pregain is too high or too low, the script may have not enough space to move the volume slider to get the needed volume correction for a given file, depending on your song collection.

The gain range goes aproximately from 11 dB to -17 dB (5 to -23 if the 6 dB pregain is applied) with gstreamer and xine engines.

last updated on:
October 22nd, 2007, 15:35 GMT
price:
FREE!
developed by:
Miguel Angel Alvarez
homepage:
www.replaygain.org
license type:
GPL (GNU General Public License) 
category:
ROOT \ Multimedia \ amaroK Scripts
ReplayGain
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