modulate and iqdemod plugins doesn't do anything to the audio?

[Chris8580]

Since these plugins aren't described very well, I'm not sure if I'm doing it wrong or if they don't work in Audacity 3.0
Tried them in Linux and Windows.

[YalekW5435]

You probably need a stereo track and a comparable sampling rate such as 192 Khz both ways. Might also want VB audio cable as a virtual soundcard to test it the right way too.
I have a complete guide on NFM somewhere but I still need to find it...