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Diffstat (limited to 'desiredata/doc/3.audio.examples/H08.heterodyning.pd')
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1 files changed, 0 insertions, 85 deletions
diff --git a/desiredata/doc/3.audio.examples/H08.heterodyning.pd b/desiredata/doc/3.audio.examples/H08.heterodyning.pd deleted file mode 100644 index 5bdf28e3..00000000 --- a/desiredata/doc/3.audio.examples/H08.heterodyning.pd +++ /dev/null @@ -1,85 +0,0 @@ -#N canvas 280 49 607 705 12; -#X text 336 665 updated for Pd version 0.39; -#X text 109 12 MORE ON MEASURING SPECTRA: HETERODYNING; -#X obj 46 289 phasor~ 100; -#X obj 99 343 phasor~; -#X floatatom 99 320 5 0 999 0 - #0-freq -; -#X obj 99 395 cos~; -#X obj 148 395 cos~; -#X obj 148 370 +~ 0.25; -#X obj 47 547 snapshot~; -#N canvas 536 459 382 265 startup 0; -#X obj 22 24 loadbang; -#X obj 22 48 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1 --1; -#X obj 22 67 f \$0; -#X text 35 195 This subpatch loads initial; -#X text 31 219 values in number boxes.; -#X obj 223 132 metro 250; -#X obj 223 107 r \$0-metro; -#X obj 223 156 s \$0-tick; -#X msg 22 91 \; \$1-freq 100 \; \$1-lop 2 \; \$1-metro 1 \; pd dsp -1; -#X connect 0 0 1 0; -#X connect 1 0 2 0; -#X connect 2 0 8 0; -#X connect 5 0 7 0; -#X connect 6 0 5 0; -#X restore 382 573 pd startup; -#X obj 47 446 *~; -#X obj 91 446 *~; -#X obj 48 471 lop~; -#X obj 92 471 lop~; -#X floatatom 153 435 3 0 100 0 - #0-lop -; -#X text 186 435 <-- responsiveness; -#X obj 136 547 snapshot~; -#X floatatom 47 575 5 0 0 0 - - -; -#X floatatom 136 575 5 0 0 0 - - -; -#X obj 161 496 r \$0-tick; -#X obj 161 517 t b b; -#X obj 47 643 expr sqrt($f1*$f1+$f2*$f2); -#X floatatom 47 669 5 0 0 0 - - -; -#X text 56 248 signal to; -#X text 58 268 analyze; -#X text 51 44 Another method for picking out the strengths of partials -in a sound is heterodyning. We guess the frequency of a partial (as -in the previous patch) but this time we multiply by a complex exponential -to frequency-shift the partial down to zero (DC).; -#X text 47 126 Then a low-pass filter (applied separately on the real -and imaginary parts) removes all but the DC component thus obtained. -The result is two audio signals (which we take snapshots of) holding -the real and imaginary parts of the complex amplitude of the partial -we want. Compared to the previous method \, this had the advantage -of reporting the phase of the partial as well as its frequency.; -#X text 240 358 modulate; -#X text 237 394 to DC; -#X text 154 321 <-- test frequency; -#X text 236 376 test frequency; -#X text 132 471 low-pass filter; -#X text 55 596 real; -#X text 59 611 part; -#X text 207 589 part; -#X text 198 574 imaginary; -#X text 105 670 magnitude; -#X connect 2 0 10 0; -#X connect 2 0 11 0; -#X connect 3 0 5 0; -#X connect 3 0 7 0; -#X connect 4 0 3 0; -#X connect 5 0 10 1; -#X connect 6 0 11 1; -#X connect 7 0 6 0; -#X connect 8 0 17 0; -#X connect 10 0 12 0; -#X connect 11 0 13 0; -#X connect 12 0 8 0; -#X connect 13 0 16 0; -#X connect 14 0 13 1; -#X connect 14 0 12 1; -#X connect 16 0 18 0; -#X connect 17 0 21 0; -#X connect 18 0 21 1; -#X connect 19 0 20 0; -#X connect 20 0 8 0; -#X connect 20 1 16 0; -#X connect 21 0 22 0; |