I like to keep my Artist/Album/Track information in ALL the tags - ID3v1, ID3v2 and APE. Some of the MP3s I buy have Artist/Album/Track information in ID3v1 and ID3v2 tags only.
I also like to adjust the volume of my MP3 with MP3Gain. MP3Gain stores "Undo" and "Replaygain" information in an APE tag.
If I use MP3Tag and have it set to read AND write all of ID3v1, ID3v2 and APE it ignores the Artist/Album/Track data in the ID3v1 and ID3v2 tags and only reads the MP3Gain data in the APE tag. The Artist/Album/Track data appears to have disappeared.
If I set MP3Tag to only read ID3v1, ID3v2 it (obviously) presents the Artist/Album/Track data correctly but ignores the MP3Gain Undo and Replaygain data. If I then WRITE the data it overwrites the MP3Gain information in the APE Tag.
Can MP3Tag be set to not overwrite fields which already exist in the file?