I have thousands of mp3 tracks that are tagged with ID3v2 (artist, title, album, etc.) as well as APEv2 (mp3gain undo info). I tagged them using Mp3tag about 5 years ago. Since then, I have somehow unintentionally acquired some ReplayGain data in many of my ID3v2 tags, stored in the TXXX and RGAD frames. Perhaps this data was automatically generated into the tags by some program I was using. Anyway, I didn't create it purposely, and I don't even know if it is valid. I would like to get rid of it, preferably with a batch Action. Unfortunately, Mp3tag does not have a mapping to the RGAD frame. So how do I go about deleting contents in that frame, or chucking the frame altogether. Also, as far as the TXXX frame is concerned, how do I write an action to clear ReplayGain info out of a TXXX frame?
Curiously, the same files that somehow acquired the above-mentioned ReplayGain data also somehow acquired ID3v1 tags. So now they have ID3v2 at the start and ID3v1 at the tail. I guess this doesn't hurt anything, other than the fact that Mp3tag now shows the Year twice in the Tag Panel. Is there an easy way to simply delete all the ID3v1 tags? They don't contain anything that is not already in the ID3v2 that I created in the beginning.