I'm using the Picard plugin 'keep'.
For a series of classical CDs I used "Exact Audio Copy" to rip the files into mp3. This software writes id3 tags like CTDOC, CTDBDISCCONFIDENCE, CTDBTRACKCONFIDENCE or PERFORMER in my mp3 files.
All this EAC-tags are not in the list of my
How can I force
$keep() to only keep the tags I list in