There are other bugs here about musicip and slim and duplicates. This is more specific - the musicmagic plugin does not reload a changed musicmagic library no matter what the time setting is in the relevent config page. I.e. after an initial scan (which does now work for me without duplicates provided i dont have anything in the "music library location" setting) it is impossible to see albums subsequently added to the database without a new scan. I have tried using the musicmagic debug after a scan but can see no activity in it.