Additive Synthesis is a method in which a composite waveform is formed by summing sinusoidal components, for example, harmonics of a tone, to produce a sound (Moorer, 1985) .
In addition to this, the concepts of additive synthesis have also existed since the introduction of the organ where different pipes of varying pitch are combined to create a sound or timbre.
However, a popular approach to the additive synthesis system is to use frequencies that are integer multiples of the fundamental frequency, which is known as harmonic additive synthesis.
The module entitled "Sound Synthesis" contains tracks about additive synthesis
, subtractive synthesis, non-linear synthesis, and, curiously, a history of computer music.