I would like to know about radio waves used for FM or AM radio. I have read many articles that say, "The sound is encoded and rides on a carrier radio wave". How is that encoded? I am under the assumption that waves just have a frequency and wavelength and that is all. If a wave is transmitted at 101 Mhz then isn't that wave just a continuous 101Mhz? How does anything get encoded onto a wave of continuous frequency? Aren't wavelength and frequency locked together so that neither can be modified without modifying the other? If that's that the case, how can anything be "encoded"? I am lost, please help!