I may be about to solve it in a convoluted way.

I need to be able to use jack-volume:

https://github.com/voidseg/jack-volume

to mute or unmute or raise or lower the volume on command (eventually from a script, probably python.)

Has anyone ever used jack-volume before? Can anyone explain how it should work? Test to see if they can get it to work?

Iiuc, it uses OSC to communicate from the (python) client to the jack-volume (server).

I have never really used OSC either. Does the protocol contain acks that I can look for with wireshark?

What else should I ask?

all the best,

drew