#!/bin/bash
# ~/record2mics.sh
# reconfigure Pulseaudio for dual microphone recording

pactl load-module module-null-sink sink_name=inputs
pactl load-module module-loopback sink=inputs
pactl set-default-source inputs.monitor
make it executable
chmod +x record2mics.sh

pacmd load-module module-null-sink sink_name=MySink
pacmd update-sink-proplist MySink device.description='"My Sink"'


and then create a launcher to run
sh ~/record2mics.sh

not as polished as the PCLinuxOS mixer on/off button
but will get the same result with 1 click to start recording

modules can be unloaded when no longer needed by restarting Pulseaudio
systemctl --user restart pulseaudio