Thank you, that is a reeeealy good idea. Why haven`t i thought of this before...
Well, to be serious again. I think, it's an essential feature of a DJ software, to be able to choose what is listed in my library and what's not.
I use "player pro" for playing audio, wich also uses the android media database. In this app, i can easily choose a specific music folder. All other folders containing audio are hidden.
Anyway, I found a workaround for my problem:
I moved all my folders containing audio that i don't want to use in cross-dj into one folder and renamed it, starting with a dot. When i do a media rescan (widget), android will not scan this folder.
Unfortunately, if i want to play music to my daughter, i have to rename that folder again, remove the dot and do another media rescan.
Perhaps its possible to write a batch script that does all those steps in one click, but i'm not a programmer.
But hey... Actually, that should be your job