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path: root/pd/doc/3.audio.examples/08.phase.mod.pd
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#X obj 216 145 *~;
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#X obj 297 125 line~;
#X floatatom 128 108 0 0 0;
#X obj 128 222 cos~;
#X obj 128 178 +~;
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#X text 20 159 audio;
#X text 93 110 show level;
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#X msg 204 299 MUTE;
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#X obj 297 73 / 100;
#X text 271 8 modulation index;
#X text 271 23 in hundredths;
#X text 125 65 carrier;
#X text 124 83 frequency;
#X text 201 64 frequency;
#X text 202 47 modulation;
#X text 33 119 carrier;
#X text 33 134 phase -->;
#X text 6 162 phase;
#X text 5 177 modulation-->;
#X text 12 204 output;
#X text 11 221 waveform -->;
#X text 527 6 PHASE MODULATION;
#X text 417 703 updated for Pd version 0.34;
#X text 13 377 Most implementations of "FM" actually use phase \, not
frequency \, modulation \, because it extends in a more natural way
to "multi-operator FM" with three or more oscillators.;
#X text 15 437 To do phase modulation \, we split the "carrier oscillator"
into its phase calculation (phasor~) and its waveform lookup (cos~).
These together would be equivalent to an osc~ object \, but the "+~"
between them adds the modulating oscillator's output to the phase.
;
#X text 18 587 The units of the "modulation" index change--it is now
dimensionless and relative to the modulation frequency \, and "good"
values tend to be between 0 and 1 In this patch it's in hundredths.
;
#X text 19 658 We also have to use a line~ to smooth changes in the
modulation index \, which wasn't necessary in the previous patch.;
#X obj 128 135 phasor~;
#X obj 117 557 cos~;
#X obj 117 529 phasor~;
#X text 60 539 this:;
#X text 219 532 is the same;
#X text 220 551 as this:;
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#X msg 251 216 bang;
#X text 298 215 <-- graph them;
#X text 386 99 <-- change smoothly to avoid clicks;
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