4 Stars, and I just found this here and still have to try....
But, I've waiting years for an AddOn that enables this on every site and even tried a Hardware-Compressor between the PC Audio Out and my old Stereo amp. (it worked somehow but way to complicated), because Movie sound without 5.1 (or more) sounds awfull on Stereo, but Music played over 5.1 Amps.....NO, WAY! And having an Amp with a 50+Pages Manual, A remote with about 35-40 buttons (on something half the size of my TV Remote with maybe 12???
I'll go full Amok- Gozilla on Meth. Destruction Rampage until something stops me....( H-Bomb > 20 Megatons maybe?)
No, serious. Thank you so much.
As long as this AddOn won't let my PC explode (or turn it into Something with an Apple Logo )I
will raise to 5 Stars soon

I also found this works great. Easy to setup and control. It has been an annoyance of mine for years having to continuously adjust the volume up and down to hear speech and quiet action/scary parts of the movie. I live in an apartment building and have neighbours. Thank you Viloja :-)

It works great.
Would love it if negative gain was added.