Display alphabetical sections/groups in artist, album und song view

Feature description:

I was using AIMP for a few months and really liked the secions (groups) within the album view, artist view and title view. I also liked to be able to collapse (and afterwards expand) individual groups, I am currently not interested in.

Problem solved:

As I have a lot of different artists and albums, scolling is not as efficient as it could be for me. Having the possitibility to use sections/groups would help me a lot to have a better overview.

Brought benefits:

Every user with a large collection might find this feature useful, if having the letters on the right side is not sufficient.

Other application solutions:

 
AIMP - see attached screenshot
 

Additional description and context:

 
This feature should be configurable in the user interface (on/off) per view (album, artist etc.)
Having the possibility to collape/expand would be nice, but is not mandatory.
 

Screenshots / Mockup:

 

   

Sorry but this does only works for ASCII and for alpha sort order so a very very small subset of usages.
Fast scroll indicators works in a lot more cases.