ReplayGain

[jes]

This has been a helpful conversation, thank you. I obviously did not fully appreciate that Mp3Gain does modify the mp3 files, which I'm not a big fan of. Thankfully, I was able to undo the gains to restore the original audio. I used foobar2000 to calculate the replaygains, which are now stored in id3v2 tags (without applying them to the file directly). I also deleted all APE tags (and id3v1) to have now just one set of tags. Better outcome overall I think.