I've been using the combination of Foobar/mp3 tag for years now. Foobar gets replaygain and I found instructions on how to convert those to iTunes Soundcheck using mp3tag.
All this time I've been wondering about one thing though. In MP3tag I show the comment field ans also "Comment Itunnorm" which holds the iTunes value. Ather the conversion though some files (not all) have a comment which also looks like a "comment itunnorm" value but it is not the same value. What is this, can I just delete those and can I prevent them from occuring (if unnecessary I want my tags to be clean).
conversion is thone using this action, courtesy of someone on the forum here:
$if($eql(%_extension%,mp3),$rg2sc(%REPLAYGAIN_ALBUM_GAIN%),)
Example: I only use id3v2 tags:
file
comments: 00001FC0 00001FC0 00001FC0 00001FC0 00001FC0 00001FC0 00001FC0 00001FC0 00001FC0 00001FC0
Comment itunnorm: 00001EF5 00001EF5 00001EF5 00001EF5 00001EF5 00001EF5 00001EF5 00001EF5 00001EF5 00001EF5
The replaygain values are like -8.99 dB (four of thos with different values)