system
Given the following post, respond as if you're commenting on Reddit:
human
How do you transform sound into radio waves?

If my understanding of sound is correct, the pitch is determined by the frequency of the sound. 
And radio waves are determined by a certain frequency of the wave itself...
So how are we able to transform the frequency of the sound into radio frequencies, and transform it back while still getting the correct pitch?
gpt
Sound waves travel from a person's voice to a microphone.  A diaphragm, attatched to a metal coil, vibrates and produces electrical signals.  The sound is now an electrical signal.

Then, the electrical signal is converted into radio waves.  

There are two main technologies for turning sound waves into radio waves: AM and FM.

AM, or Amplitude Modulation, works by modulating the amplitude "power" of the radio wave in response to the peaks and valleys of the sound wave. 

FM, or Frequency Modulation, combines two waves: the carrier and the sideband.  One wave has a constant frequency.  The other wave hovers around the constant frequency, but actually changes its wavelength in response to the peaks and valleys of the sound wave.

 en.m.wikipedia.org/wiki/Frequency_modulation#/image/File:Amfm3-en-de.gif  A great animation.

The waves then reach your radio set, where they are converted to electrical signals, which are in turn converted into sound by the speakers.