This shortcut allows you to enable Background Sounds and choose what plays. By running a second time and choosing ‘ON’ again you can change the sound.
Run the shortcut again and choose ‘OFF’ to turn it off (duh).
Whenever you turn it on for the first time it will automatically start playing the last Sound chosen before asking what you want the sound to be.
unfortunately there doesnt seem to be a way to check if Background Sound is already on.
This also sets the default volume of background sounds down a bit as the original default is quite loud.