Hi everyone, usually don't post much but getting desperate after scrolling through all the mac forums to no avail. Currently running a MacBook Pro (Retina, 13-inch, Early 2015) which I have linked up to an external monitor (ASUS VA32AQ) via mini display-HDMI connection. In order to control my external monitor's volume, I used the program Sound Control which allowed me to do so using the volume buttons on my keyboard.

Everything was fine until I upgraded to OS Mojave. A few things happened. Firstly, my sound devices were duplicated for some reason as seen here: https://imgur.com/a/qicIsv0. The VA32AQ channel doesn't let me adjust my volume via the keyboard keys. The VA32AQ(S) channel DOES allow me to do so, however, the audio is all messed up with static. Internal speaker works fine while Internal Speaker(S) produces no sound.

I suspect that the program Sound Control may have duplicated the audio devices when I upgraded operating system. So I tried uninstalling it properly but it didn't get rid of the duped devices. I then tried what everyone else was doing and deleting any associated .kext files in Computer/System/Library/Extensions, but there were none that I could find.

Firstly, how can I remove those duped audio devices? If not possible, does anyone have any idea why the VA32AQ(S) channel is producing crazy static and is there any way I can work around this? https://dltutuapp.com/ https://9apps.ooo/ https://showbox.software/

Thanks