I would like to be able to hear a simulation of what the actual radio waves sound like, should I be able to hear them directly. I understand the math of frequency modulation, and am willing to make the required program if none are currently available, but I don't know anything about working with sound files.
I can try changing my speed on the signal to make the output more intelligible. I should clarify: I already know the math; what I don't know is how to use the math on signals in e.g. .mp4 files. I don't care what programming language I need to use, though I prefer GoLang, Python, Java, C#, C++, Pascal, Mathematica. Also, if someone already has a freeware program in which it could be done, I'd try it.