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#X text 469 66 APPLYING TWO-COSINE CARRIER TO FM;
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#X text 352 208 modulating;
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#X text 38 274 both phases-->;
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#X text 159 267 Fourier series;
#X text 173 318 magnitude;
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#X text 52 23 This subpatch computes the spectrum of the incoming signal
with a (rectangular windowed) FFT. FFTs aren't properly introduced
until much later.;
#X text 88 99 signal to analyze, f 9;
#X text 256 351 delay two samples;
#X text 254 369 for better graphing;
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#X text 471 99 We can apply the two-cosine method to FM synthesis to
get FM spectra which slide up and down: we just treat the cosines like
carrier signals in an FM instrument. This doesn't work as well as you'd
wish \, because the phases of the partials of the two FM instruments
don't line up \, so that \, for indices of modulation above about 20%
\, you get beating effects as the center frequency goes up and down.
, f 43;
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#X text 97 34 center freq. (in tenths of fundamental), f 13;
#X text 39 93 fundamental (= mod freq), f 12;
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