The Fundamentals of AM Synthesis - Pro Audio Files.
History of FM Synthesis FM techniques have been around since the early 20th century, and by the 1930s FM theory for radio broadcasting was welldocumented and understood. It was not until the 1970s, though, that a certain type of FM was thoroughly researched as a musical synthesis tool. In the early 1970s, John Chowning.
FM (Frequency Modulation) synthesis has a reputation for being complicated and long-winded, but this isn’t really true in the case of modern software options. While the theory is indeed complex, contemporary FM soft synths are actually very easy to use.
A special situation arises when the modulation frequency is a whole number multiple of the carrier frequency (i.e., 1x, 2x, 3x, 4x, 5x, 6x, etc.). The other tones above the carrier frequency would also be whole number multiples of the carrier frequency - i.e., its overtones. Furthermore negative frequencies are mirrored above in the positive range.
They had to create their own synthesizers thus creating new ways to approach sound synthesis. Over time, a slew of ways to approach sound synthesis came about. Synthesizers based on additive synthesis, frequency modulation, granular synthesis and phase distortion to name a few began to hit music stores.
The Real Math of FM Synthesis: Learn FM 4 by Composing Gloves. 15:33.. Pulse Width Modulation with FM Modulation by Composing Gloves.. History Help.
A Brief History Of Frequency Modulation Discovered by John Chowning in 1967, FM Synthesis was later licensed to Yamaha to power their ground-breaking DX range. Arriving in a flurry of new terms and loaded with striking presets, FM was a world away from the squelches and sweeps of analogue, yet at its heart was a familiar tale of oscillator modulation.
In outline, it is similar to phase modulation synthesis as championed by Yamaha Corporation (under the name of frequency modulation), in the sense that both methods dynamically change the harmonic content of a carrier waveform by influence of another waveform (modulator) in the time domain.