This is a plugin for ranger file manager that adds 3 custom commands for interacting with cmus audio player:
:cmus_play: sending files/folders to playlist.:cmus_lib: adding files/folders to library.:cmus_queue: enqueuing files/folders.
Copy cmus.py file to ~/.config/ranger/plugins folder and restart ranger.
Just select or mark some files/folders and enter one of the commands, e.g. :cmus_play.
You can also add these lines to ~/.config/ranger/rc.conf to use these keyboard shortcuts (ep, el, eq):
map ep cmus_play
map el cmus_lib
map eq cmus_queue