FM synthesis is a synthesis method that uses frequency modulation
to combine multiple operators, which are waveform sound sources,
to complexly transform the waveform and generate sound.
Operators are like oscillators in subtractive synthesis, but each one
has an independent envelope generator.
Also, the modulation side is called a "modulator" and the output side
is called a "carrier", and various modulation paths can be created by
combining them.
This combination of modulation paths is called an "algorithm" in FM
synthesis.
Complex overtone changes over time are realized by changing
operator parameters and selecting algorithms.
MEGA SYNTHESIS uses a 4-operator-8-algorithm FM synth engine,
similar to the YM2612 sound chip that was used in game consoles
that were a big hit from the late 80's to the 90's.
You can create a wide range of sounds from nostalgic game sounds,
glittering bells, chaotic noises, and acoustic percussion.
FM Synthesizer
30
Operator
Modulator
Carrier