Convert replaygain values

Support
30

aha. so you weren't actually creating itunnorm values due to the typo. Glad its fixed. This is my action info. I have both of these combined in one single action.

for mp3. (replace _ALBUM_ with _TRACK_ to use RG Track value)
Format Value:
field:
COMMENT ITUNNORM
Format String:
$if($eql(%_extension%,mp3),$rg2sc(%REPLAYGAIN_ALBUM_GAIN%),)

for m4a.
Format Value:
Field
ITUNNORM
Format String:
$if($eql(%_extension%,m4a),$rg2sc(%REPLAYGAIN_ALBUM_GAIN%),)