These configuration options are affecting audio formats which are using APE tags by default (like Musepack, Monkey’s Audio, WavPack, …).

Read

ID3v1 If enabled, Mp3tag reads an existing ID3v1 tag.

APE If enabled, Mp3tag reads an existing APEv1 or APEv2 tag.

If both, ID3v1 and APE, are enabled, Mp3tag first reads an ID3v1 tag and after that the APE tag.

Write

ID3v1 If enabled, Mp3tag writes an ID3v1 tag to the file.

APEv2 If enabled, Mp3tag writes an APEv2 tag to the file. If the file already has an APEv1 tag, Mp3tag will update this tag to an APEv2 tag. If the file has an ID3v1 tag, Mp3tag will update this tag too.

Remove

ID3v1 If enabled, Mp3tag removes an existing ID3v1 tag.

ID3v2 If enabled, Mp3tag removes an existing ID3v2 tag.

APE If enabled, Mp3tag removes an existing APEv1 or APEv2 tag.