annotate examples/08-PureData/karplusStrong/_main.pd @ 531:ddb86944e138 prerelease

cleaned up all pd examples (and removed some). added polysynth and vangelisiser to instruments examples

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#X obj 40 660 dac~ 1 2;
#X text 33 22 Karplus Strong;
#X text 33 32 ==============;
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#X text 135 286 <<< centre (i.e. DC block) signal with high-pass filter
;
#X text 126 492 <<< use potentiometer or fader on second analog in
;
#X text 37 190 EXCITATION INPUT:;
#X text 37 418 DELAY PERIOD:;
#X text 214 655 <<< and decay here [0-0.9999];
#X text 155 307 <<< thresholding to remove any consistent noise in
the excitation signal;
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#X obj 40 515 -~;
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#X text 214 635 <<< set damping here [100-20000];
#X obj 120 657 *~ 0.99;
#X text 126 573 <<< period range between 2-12ms;
#X text 151 505 to set period (or 'length of string');
#X text 36 55 This is an example of simple 'Karplus Strong' synthesis
;
#X text 36 69 which produces a sound resembling a plucked string by
;
#X text 36 84 feeding the filtered output of a delay line back into
;
#X text 36 98 itself. Here we use the left audio input as an excitation
;
#X text 36 112 mechanism for the string. Try connecting a piezo to
bela's;
#X text 36 126 audio input and tapping against it. The first analog
input;
#X text 36 140 sets the length of the string.;
#X text 485 15 ............................;
#X text 485 25 . ____ ._____ _ .......___ .;
#X text 485 35 .| __ )| ____| |....../ _ |.;
#X text 485 55 .| |_) | |___| |___ / ___ |.;
#X text 485 65 .|____/|_____|_____/_/..._|.io;
#X text 485 75 ............................;
#X text 485 45 .| __ || __|.| |...../ _| |.;
#X obj 40 307 gate-xfer 0.1;
#X text 116 234 <<< use piezo or microphone on left audio channel;
#X text 140 248 (you can even try hooking up an accelerometer...);
#X text 37 200 ----------------;
#X text 37 429 ------------;
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