FM synthesis, or Frequency Modulation synthesis, is a method of sound synthesis that creates complex audio signals by varying the frequency of one waveform with another. This technique allows for the generation of a wide range of sounds, from simple tones to rich, evolving textures. It is widely used in electronic music and sound design. Developed in the 1960s by John Chowning, FM synthesis became popular with the release of the Yamaha DX7 synthesizer in the 1980s. The ability to create realistic instrument sounds and unique timbres made it a favorite among musicians and producers, influencing various genres of music.