`pactl` is the command line version

Also tried, also useless. The program producing the sound is being run by another user.

And 'ssh -X' is also a thing.

>For a headless system, it's useless.

DualSense is a game controller. In this context, headless is unlikely.

Depends on how you define headless, but the fact is, I'm rarely logged into it, and there's no mouse nor keyboard connected, nor any X server running.

you can actually use pavucontrol for remote PA servers that have native-protocol-tcp running

$ PULSE_SERVER=192.168.1.21 pavucontrol