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AUDIO PACKAGE SYMBOL

FrequencyModulation

creates a Sound object that is a frequency-modulated sinusoid, having carrier and modulating frequencies

and

, measured in hertz, peak deviation pd hertz, and a duration of dur seconds.

FrequencyModulation[f_c, {{f₁, pd₁}, {f₂, pd₂}, ...}, dur, ModulationType->Cascade]
creates a cascade frequency-modulated sinusoid, where

is the peak deviation associated with modulating frequency

FrequencyModulation[f_c, {{f₁, pd₁}, {f₂, pd₂}, ...}, dur, ModulationType->Parallel]
creates a parallel frequency-modulated sinusoid, where

is the peak deviation associated with modulating frequency

DisplayFunction	Identity	function to apply to sound before returning it
ModulationType	Standard	the type of modulation to use
PlayRange	All	range of sound amplitude levels to include
SampleDepth	8	number of bits used to encode sound amplitude
SampleRate	8192	sampling rate per second

Cascade frequency modulation is a type of frequency modulation where the modulating frequency is itself modulated, thus cascading the modulation.

In contrast to cascade frequency modulation, Parallel frequency modulation is a technique where the carrier frequency is modulated by two or more modulating frequencies that do not modulate each other.