Screenshot / Code Snippet
This script adds a sound volume control to each SE chatroom.
I created it after seeing complaints about the sound being too loud.
The script hooks-up into the volume control of the jPlayer used by Stack Exchange.
This post is a spin-off of my original MSE answer: Audio slider for chat pings
The script is expected to work in any by Stack Exchange supported browser with a decent script manager installed, like TamperMonkey or ViolentMonkey.
Don't expect support for GreaseMonkey 4.
Leave bugs or feature requests as answers on this question or submit direct PRs if you have immediate improvements to offer.