I'm guessing the answer to this is no, but figured I'd bring it up. Is there a method to add custom cover art levels? For example, there's Series, Artist, and Album. Under some of the Artist in my collection, I have thousands of live recordings, and some with multiple recordings per date (different microphone sources per concert). At each concert level, I'd like to have one cover art file that doesn't get added to the FLAC file. Here's an example:
Dave Matthews Band > 2013 > 2013-09-04 > I then have 3 sources (dpa4028.flac16, dpa4028.flac24, and mk4.flac16). Each of those recordings has 23 tracks. So 69 files. There's one concert poster based on the date of 2013-09-04 and it's 85 KB. So 69 times that is a waste of space. This is a pretty simple example, in reality I have several concert dates with 10+ sources, so it increases exponentially. There are about 53k files under this one artist, and probably only 900 - 1000 concerts. So you can see where the increase starts to occur for embedded or unique coverart files.
Thanks!
--Ryan