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Principles of Audio-Rate Frequency Modulation
https://www.moz.ac.at/sem/lehre/lib/ks/lib/fm/fm.htm.html
Terms: audio rate, modulation, carrier, modulator, sidebands, reflected sidebands, Bessel function, carrier:modulator ratio, linear (Chowning) or exponential FM. This article explains the phenomenon of audio-rate frequency modulation of sound, which was explored and used compositionally by John Chowning of Stanford University around 1970.
Synthesis Chapter Four: Audio-rate FM Synthesis
https://cmtext.indiana.edu/synthesis/chapter4_fm.php
Principles of Audio-rate FM Synthesis. This section explains the phenomenon of audio-rate frequency modulation (FM), which was explored and used compositionally by John Chowning, former director of Stanford University's CCRMA studios, beginning around 1970. His discoveries eventually lead to the design and release of the Yamaha DX-7 family of ...
Synthesis Chapter Four: Audio-rate FM Synthesis 5
https://cmtext.indiana.edu/synthesis/chapter4_fm5.php
The video below visually and audibly demonstrates the first 6 orders (0-5) of sidebands as I increases from 0 (i.e. no modulation) to 5. The carrier frequency is 700 Hz and the modulating frequency is 85 Hz. See if you can aurally track individual frequencies, such as the carrier (red) as they increase, decrease or disappear as I increases.
“BASIC PRINCIPLES OF FREQUENCY MODULATION” 1944 …
https://archive.org/details/47194-army-pictorial-service-basic-principles-of-frequency-modulation
With this addition, the frequency now varied at an audio rate (9:41). A diagram follows pointing to a line which represents the rest frequency of the oscillator (11:14) and how it varies when sound is impressed on the capacitator mic (11:34).
Principle of frequency modulation - BrainKart
https://www.brainkart.com/article/Principle-of-frequency-modulation_6696/
Principle of frequency modulation . Frequency modulation uses the information signal, V m (t) to vary the carrier frequency within some small range about its original value. Here are the three signals in mathematical form: Information: V m (t). Carrier: V c (t) = V co sin ( 2 p f c t + f ). FM: V FM (t) = V co sin (2 p [f c + (Df/V mo) V m (t) ] t + f). We have replaced the carrier frequency ...
Modulation Synthesis - CCRMA
https://ccrma.stanford.edu/courses/220b-winter-2006/topics/modulation-synthesis/
Here are a couple of links to interesting stuff about Frequency Modulation: Principles of Audio Rate Frequency Modulation; About FM. CLM stuff you should look up. definstrument (how to define a CLM instrument) oscil (a sinewave oscillator) env (a piecewise linear envelope) outa (basic one channel output) with-sound (how to get everything working)
Principles of Communication - Modulation
https://www.tutorialspoint.com/principles_of_communication/principles_of_communication_modulation.htm
Principles of Communication - Modulation, A signal can be anything like a sound wave which comes out when you shout. This shout can be heard only up to a certain distance. But for the same wave to trave. ... then such a technique is called as Frequency Modulation.
The fundamental principles of frequency modulation (1946)
https://citeseer.ist.psu.edu/showciting?cid=1391164
A review and tutorial of the fundamental ideas and methods of joint time-frequency distributions is presented. The objective of the field is to describe how the spectral content of a signal is changing in time, and to develop the physical and mathematical ideas needed to understand what a time-varying spectrum is.
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