I wanted a really quiet way to stop/start recording audio, so I used LoopMIDI, OpenStageControl and MIDI-Mixer to do that with something that is quieter than any other input device that's somewhat easy to hook up to a Windows computer.
Tools used:
LoopMIDI https://www.tobias-erichsen.de/softwa...
OSC http://openstagecontrol.ammd.net
MIDI-Mixer https://www.midi-mixer.com