How can I remap my microphone channels in Qubes?

I am having a similar issue to this stackexchange post:

I tried to follow their solution and load a pulseaudio module to remap a single channel from my mic into a new mono source.
when I tried adding the command to the ‘’ file and rebooting, it caused the entire audio system to not connect until the line was removed. I then tried installing pactl and loading the command from the terminal but I got a ‘connection refused’ error.