I have a local copy of FreeDB.
I set the local db path as the default option.
I select mp3s from a directory and I choose "freedb ( local )" from the freedb menu, then I want to choose "determine from selected MP3-files" but this option is light grey and I cannot select it.
this option and the query based on a search string are not available for local databases.
The freedb query based on select files option uses a fuzzy matching
algorithm of the remote freedb-server software to get the results. The
option is greyed out at local freedb, because disc-id calculation based on
audio files couldn't be as exact as needed for getting the right album.