文档介绍：Frequency Modulation Synthesis (2/2) Page 1 of 9
Frequency Modulation Synthesis (FM) - part 2 of 2
by Nicky Hind
List of Topics
l Introduction
l The Rule of Thumb Method of Calculating the Position of Sidebands
l Simulation of a Drum Sound using FM
l Example 1: FM Drum With One Carrier/Modulator Pair
l Some Calls to the drum Instrument
l Simulation of a Tubular Bell Sound Using FM
l Example 2: Tubular Bell Instrument With 3 Carrier/Modulator Pairs
l Some Calls to the tubular-bell Instrument
Introduction
In FM Synthesis - part 1 some methods are explored in which sidebands can be positioned with the strategic use of different carrier:modulator ratios, in
order to produce various musical timbres. So far however, the c:m ratios have been such that both c and m are integers - and the resulting spectra have
thus been of a harmonic nature. In part 2, we explore some of the effects that can be produced when the carrier- and/or modulator-ratio is not an integer;
and also what happens when bine more than one carrier/modulator pair in the instrument definition. Non-integer c:m ratios can be an effective
way of producing inharmonic spectra, such as those found in bells, and many percussion instruments.
The Rule of Thumb Method of Calculating the Position of Sidebands
In FM Synthesis - part 1, a basic rule of thumb was given to determine the fre