Bookmarks you mean. Yes, in nnn you can jump to the bookmark from anywhere and then press `Alt-O` (my preferred key) to start the search.

But you know what, let me share a smarter workflow:

  find . -iname "*.mp3" -print0 | nnn -p -

Now you list all yours mp3 files in nnn, examine/play them and finally get to cherry-pick some and print them to stdout when you quit nnn.

BTW, you can also run the find within nnn and list in nnn.

If you're looking for something that can be anywhere under /, then the target directory needs to be /.