Add Album Volume Increase via Replay Gain Tag

Support
22

Add or subtract negative or positive value to REPLAYGAIN_TRACK_GAIN value or REPLAYGAIN_ALBUM_GAIN value.

For example ... add + 6dB to the existing value in the tag-field REPLAYGAIN_TRACK_GAIN.

Action: Format value
Field: REPLAYGAIN_TRACK_GAIN
Formatstring:

$replace($if($less($add($num($replace(%replaygain_track_gain%,'.',),1),'+600'),0),'-',)$replace($div($add('+600',$replace(%replaygain_track_gain%,'.',)),100),'-',)'.'$num($replace($mod($add('+600',$replace(%replaygain_track_gain%,'.',)),100),'-',),2),'--','-')' dB'

From:
2.02 dB
-2.78 dB
-6.51 dB
To:
8.02 dB
3.22 dB
-0.51 dB

To adapt the formula to your needs, replace all text strings '+600' within the above example formatstring with your special value (three replaces).
For example ...
'+450' ... represents +4.50 dB
'-450' ... represents -4.50 dB

Better to create an action group ...
and adapt only once the modifier value for the tag-field RGTG_MODIFIER within the group's action #1.

Begin Action Group RGTG.Modify

Action #1
Actiontype 5: Format value
Field ______: RGTG_MODIFIER
Formatstring: +600

Action #2
Actiontype 5: Format value
Field ______: REPLAYGAIN_TRACK_GAIN
Formatstring: $replace($if($less($add($num($replace(%replaygain_track_gain%,'.',),1),%RGTG_MODIFIER%),0),'-',)$replace($div($add(%RGTG_MODIFIER%,$replace(%replaygain_track_gain%,'.',)),100),'-',)'.'$num($replace($mod($add(%RGTG_MODIFIER%,$replace(%replaygain_track_gain%,'.',)),100),'-',),2),'--','-')'÷dB'

Action #3
Actiontype 9: Remove fields
Fields to remove (semicolon separated): RGTG_MODIFIER

Note: Replace each special ÷ character with one space character.
End Action Group RGTG.Modify (3 Actions)

DD.20120202.2102.CET