Doesn't work. even if you were to get it to control your volume the slider is jerky and wont stop at the point you tell it to. whats more there are no customisation options
In version 4.5 of the engine it is hard to change the slider. I use headphones a lot, and when not, want to be considerate to others. So I tend to use 3% volume almost always. However now, it jumps from 0% to 6% and has very bad control of "granularity".
I know this hasn't been updated in a while, but even as a programmer, I haven't built up the "energy" to want to sort out all the code and fix it. So, maybe the original author can comeback and help?