It uses playerctl to get a list of players.

The labels are displayed to pick a player.

When a player is selected it triggers play-pause.

It auto-pauses all other playing players.

The menu has options for Pause All, Next, and Prev.

There's also a daemon to autopause on player switch.

Arguments passed can be "pauseall", "next", "prev", or "autopause".

No arguments show the menu.