It works for me!

I was about to watch a video by this incredible YT channel called "Predictive History." The audio was very low and unbalanced towards the left side... I just installed this with many reservations, but all it took was pressing the icon and selecting "Make Mono". Sure enough, the audio from my interface was deliciously balanced, clear and leveled.

Unlike YT's own utility, I loved boosting the volume to the 150%, it makes it clearer and rounder in my device after compensating for the excess volume (probably due to natural compression).

Mute doesn't work, but who cares?

The UX is just OK. I don't love it, but can't hate it either.

Thank you, developer(s)!

great! works perfect, simple UI.
in my case other popular mono<->stereo addons not worked