[Request] Volume control objects in patchbay

[ParzivalWolfram]

Using JACK through PipeWire, I've got a few programs where I need to pipe multiple audio sources into one input, but when I do this, the input from, say, another program, or anything but a mic, really, becomes deafeningly loud and horribly distorted. I'd love to see this get some sort of volume control block for inputs/outputs, as it'd solve this issue nicely.