FM and Waveshaping

Non-Linear Waveform Synthesis

Generate Complex Spectra by Non-Linear Warping Function

y(t) = F( x(t) )

In Simple FM, both functions are sinusoids

Two sinusoidal oscillators are used, with one functioning as the
modulator, and the other as the carrier. The carrier generates
a sinewave which is warped by the modulation of its frequency.