Multi disc albums: mergeFolderAlbums and additional tags

[simoncn]

Multidisc albums are merged across folders automatically if the album name and artist information is the same, whether or not the mergeFolderAlbums property is true.

The tag-based approach for selecting whether or not to merge the album's discs and renumber the tracks was chosen to provide flexibility in allowing some albums to have their discs merged (where the disc boundaries are not meaningful musically) and other albums not to have their discs merged (where the disc boundaries are meaningful musically).

Mp3tag should be able to do the retagging you have described. You need to be careful about single-disc albums that have DISCNUMBER=1 tags because you would not want these albums to be renamed to "album name [disc 1]".

An alternative approach that doesn't require the album name to be changed is to add DISCSUBTITLE tags in addition to DISCNUMBER tags. For example, if DISCNUMBER is 2, you could set DISCSUBTITLE to 'Disc 2'.

There is a way to set "virtual" DISCSUBTITLE tags automatically using MinimServer configuration properties without any retagging, as follows:

1) In the itemTags property, add: DiscNumber
2) In the tagValue property, add: DiscSubtitle.default={DiscNumber}

This causes each disc to be shown separately as '>> 1', '>> 2', etc. It does not change the tags in your files.