[BRX]

Can you please explain why you need to be able to filter on songs that are cropped, annotated or have notes? That does not seem like an action that most users would ever need. If you need an advanced query like that, you could always run SQL queries against the database yourself (I can help provide those queries). 

Essentially for maintenance of the database which is very big in my case since I threw all my fakebooks on it.
The notes and annotations are not that important though it would show me these songs are already edited and are not in need to be checked or edited otherwise.
Cropping is of more importance since it not only eliminates parts that are not wanted or needed but by drawing the frame as narrow as possible you have the "magnifiying effect" which is very useful for smaller devices with only 10' screens.
So having a way to sort cropped already / not cropped is something (I guess) other users could need as well.