From 8dbec761cf858ea65900c8a094599857208d8c3a Mon Sep 17 00:00:00 2001 From: "N.N." Date: Tue, 5 Jan 2010 22:49:36 +0000 Subject: svn path=/trunk/; revision=12907 --- desiredata/doc/3.audio.examples/I04.noisegate.pd | 330 ----------------------- 1 file changed, 330 deletions(-) delete mode 100644 desiredata/doc/3.audio.examples/I04.noisegate.pd (limited to 'desiredata/doc/3.audio.examples/I04.noisegate.pd') diff --git a/desiredata/doc/3.audio.examples/I04.noisegate.pd b/desiredata/doc/3.audio.examples/I04.noisegate.pd deleted file mode 100644 index 0a8bd12a..00000000 --- a/desiredata/doc/3.audio.examples/I04.noisegate.pd +++ /dev/null @@ -1,330 +0,0 @@ -#N canvas 42 28 657 564 12; -#X floatatom 316 376 0 0 0 0 - - -; -#X floatatom 81 384 0 0 100 0 - - -; -#N canvas 98 0 648 669 fft-analysis 0; -#X obj 35 589 *~; -#X obj 143 305 *~; -#X obj 158 150 *~; -#X obj 35 72 *~; -#X obj 76 527 *~; -#X obj 35 44 inlet~; -#X obj 35 528 *~; -#X obj 34 101 rfft~; -#X obj 35 558 rifft~; -#X obj 36 616 outlet~; -#X obj 119 149 *~; -#X obj 119 176 +~; -#X obj 165 278 r mask-level; -#X obj 100 422 /~; -#X obj 355 23 block~ 1024 4; -#X text 176 446 is signal power and "m" is mask.; -#X obj 131 332 -~; -#X obj 131 355 max~ 0; -#X obj 99 448 q8_sqrt~; -#X text 175 464 (zero if s < m).; -#X obj 144 256 tabreceive~ \$0-mask; -#X obj 76 72 tabreceive~ \$0-hann; -#X obj 69 590 tabreceive~ \$0-hann; -#N canvas 91 250 910 495 calculate-mask 0; -#X obj 125 379 inlet~; -#X msg 371 283 0; -#X msg 371 166 0; -#X obj 240 196 float; -#X obj 294 200 + 1; -#X obj 240 144 bang~; -#X obj 240 169 spigot; -#X floatatom 411 218 0 0 0 0 - - -; -#X obj 315 408 -~; -#X obj 371 258 sel 0; -#X obj 327 443 *~; -#X obj 293 443 +~; -#X floatatom 351 313 0 0 0 0 - - -; -#X obj 240 219 t f f; -#X obj 370 113 r make-mask; -#X obj 371 141 t b f; -#X obj 411 165 /; -#X text 483 212 number of; -#X text 491 227 frames; -#X floatatom 481 166 0 0 0 0 - - -; -#X obj 480 113 r window-msec; -#X obj 481 136 / 4; -#X text 521 133 hop size (analysis; -#X text 546 149 period) in msec; -#X obj 359 408 tabreceive~ \$0-mask; -#X obj 292 468 tabsend~ \$0-mask; -#X obj 371 218 <; -#X obj 235 258 expr 1/($f1+1); -#X text 134 17 calculate a mask using N msec of background noise; -#X text 43 354 current power (for each channel); -#X text 367 430 average the current power into the last mask to get -the new mask. The new value is weighted 1/n on the nth iteration.; -#X text 390 312 weight to average in new power to mask; -#X text 11 203 loop counting to desired; -#X text 78 219 number of frames; -#X text 72 39 This loops for "make-mask" milliseconds \, averaging -power in each channel over that amount of time. This is done by a moving -average whose weight is adjusted to average each new value equally -with each of the accumulating ones.; -#X connect 0 0 8 0; -#X connect 1 0 12 0; -#X connect 2 0 3 1; -#X connect 2 0 26 0; -#X connect 3 0 13 0; -#X connect 3 0 4 0; -#X connect 4 0 3 1; -#X connect 5 0 6 0; -#X connect 6 0 3 0; -#X connect 7 0 26 1; -#X connect 8 0 10 0; -#X connect 9 0 1 0; -#X connect 10 0 11 1; -#X connect 11 0 25 0; -#X connect 12 0 10 1; -#X connect 13 0 26 0; -#X connect 13 1 27 0; -#X connect 14 0 15 0; -#X connect 15 0 2 0; -#X connect 15 1 16 0; -#X connect 16 0 7 0; -#X connect 20 0 21 0; -#X connect 21 0 16 1; -#X connect 21 0 19 0; -#X connect 24 0 8 1; -#X connect 24 0 11 0; -#X connect 26 0 6 1; -#X connect 26 0 9 0; -#X connect 27 0 12 0; -#X restore 132 203 pd calculate-mask; -#X text 91 98 real Fourier transform; -#X obj 357 57 loadbang; -#X msg 357 80 \; pd dsp 1 \; window-size 1024; -#X text 193 355 ... but not less than zero; -#X text 101 561 real inverse Fourier transform; -#X text 196 498 normalize by 2/(3N) where N is window size; -#X text 168 332 current power ("s") minus level-adjusted mask ("m") -; -#X text 156 175 compute power (call it "s") in each channel; -#X obj 123 395 +~ 1e-20; -#X text 203 395 protect against division by zero; -#X text 179 426 compute sqrt((s-m)/s) where "s"; -#X text 296 204 <- subwindow calculates noise mask; -#X obj 98 499 /~ 1536; -#X connect 0 0 9 0; -#X connect 1 0 16 1; -#X connect 2 0 11 1; -#X connect 3 0 7 0; -#X connect 4 0 8 1; -#X connect 5 0 3 0; -#X connect 6 0 8 0; -#X connect 7 0 6 0; -#X connect 7 0 10 0; -#X connect 7 0 10 1; -#X connect 7 1 4 0; -#X connect 7 1 2 0; -#X connect 7 1 2 1; -#X connect 8 0 0 0; -#X connect 10 0 11 0; -#X connect 11 0 16 0; -#X connect 11 0 23 0; -#X connect 11 0 32 0; -#X connect 12 0 1 1; -#X connect 13 0 18 0; -#X connect 16 0 17 0; -#X connect 17 0 13 0; -#X connect 18 0 36 0; -#X connect 20 0 1 0; -#X connect 21 0 3 1; -#X connect 22 0 0 1; -#X connect 25 0 26 0; -#X connect 32 0 13 1; -#X connect 36 0 6 1; -#X connect 36 0 4 1; -#X restore 80 441 pd fft-analysis; -#N canvas 0 110 565 454 hann-window 0; -#N canvas 0 0 450 300 graph1 0; -#X array \$0-hann 1024 float 0; -#X coords 0 1 1023 0 300 100 1; -#X restore 82 311 graph; -#X obj 378 165 osc~; -#X obj 378 190 *~ -0.5; -#X obj 378 214 +~ 0.5; -#X obj 331 247 tabwrite~ \$0-hann; -#X obj 37 88 r window-size; -#X obj 38 173 /; -#X obj 127 142 samplerate~; -#X obj 38 251 s window-sec; -#X obj 177 204 swap; -#X obj 177 228 /; -#X obj 177 252 s window-hz; -#X obj 49 201 * 1000; -#X obj 49 228 s window-msec; -#X obj 38 115 t f b f; -#X msg 173 92 resize \$1; -#X obj 173 116 s \$0-hann; -#X obj 330 105 r window-hz; -#X msg 382 130 0; -#X obj 330 131 t f b; -#X text 15 8 calculate Hann window table (variable window size) and -constants window-hz (fundamental frequency of analysis) \, window-sec -and window-msec (analysis window size in seconds and msec).; -#X connect 1 0 2 0; -#X connect 2 0 3 0; -#X connect 3 0 4 0; -#X connect 5 0 14 0; -#X connect 6 0 8 0; -#X connect 6 0 12 0; -#X connect 7 0 6 1; -#X connect 7 0 9 1; -#X connect 9 0 10 0; -#X connect 9 1 10 1; -#X connect 10 0 11 0; -#X connect 12 0 13 0; -#X connect 14 0 6 0; -#X connect 14 0 9 0; -#X connect 14 1 7 0; -#X connect 14 2 15 0; -#X connect 15 0 16 0; -#X connect 17 0 19 0; -#X connect 18 0 1 1; -#X connect 19 0 1 0; -#X connect 19 1 4 0; -#X connect 19 1 18 0; -#X restore 331 478 pd hann-window; -#X text 197 355 noise; -#N canvas 132 255 660 373 insample 0; -#N canvas 0 0 450 300 graph1 0; -#X array \$0-sample 155948 float 0; -#X coords 0 1 155947 -1 400 150 1; -#X restore 236 25 graph; -#X obj 19 23 r read-sample; -#X obj 19 74 unpack s f; -#X obj 116 74 s insamprate; -#X obj 19 184 soundfiler; -#X obj 19 208 s insamplength; -#X text 113 252 read a sample; -#X obj 33 251 loadbang; -#X obj 19 100 t s b; -#X obj 75 99 symbol \$0-sample; -#X obj 19 135 pack s s; -#X msg 19 160 read -resize \$1 \$2; -#X obj 74 46 44100; -#X msg 33 275 \; read-sample ../sound/bell.aiff; -#X msg 31 322 \; read-sample ../sound/voice.wav; -#X obj 19 47 t a b; -#X connect 1 0 15 0; -#X connect 2 0 8 0; -#X connect 2 1 3 0; -#X connect 4 0 5 0; -#X connect 7 0 13 0; -#X connect 8 0 10 0; -#X connect 8 1 9 0; -#X connect 9 0 10 1; -#X connect 10 0 11 0; -#X connect 11 0 4 0; -#X connect 12 0 3 0; -#X connect 15 0 2 0; -#X connect 15 1 12 0; -#X restore 331 456 pd insample; -#X obj 316 401 s mask-level; -#X floatatom 202 379 0 0 100 0 - - -; -#X text 317 325 on; -#X text 362 326 off; -#X text 317 309 masking; -#X text 290 5 DENOISER; -#X msg 361 349 0; -#N canvas 190 43 812 571 test-signal 0; -#X obj 75 328 line~; -#X obj 75 250 f; -#X obj 251 164 r insamprate; -#X obj 583 219 *~; -#X obj 76 442 *~; -#X obj 583 110 noise~; -#X obj 370 493 +~; -#X obj 98 415 dbtorms; -#X obj 605 193 dbtorms; -#X obj 98 390 inlet; -#X obj 605 169 inlet; -#X obj 371 541 outlet~; -#X obj 236 139 r insamplength; -#X msg 75 304 0 \, \$1 \$2; -#X obj 75 276 pack 0 0; -#X obj 236 248 /; -#X obj 251 190 * 0.001; -#X obj 251 219 t b f; -#X obj 370 516 hip~ 5; -#X obj 75 136 loadbang; -#X obj 75 182 metro 1000; -#X obj 583 135 bp~ 10000 3; -#X obj 75 161 tgl 15 0 empty empty empty 0 -6 0 8 -262144 -1 -1 1 1 -; -#X text 270 247 sample duration \, msec; -#X text 126 84 looped sample playback; -#X obj 75 356 tabread4~ \$0-sample; -#X text 580 83 filtered noise; -#X text 105 15 TEST SIGNAL: looped sample plus noise. The inlets control -amplitude of each in dB.; -#X connect 0 0 25 0; -#X connect 1 0 14 0; -#X connect 2 0 16 0; -#X connect 3 0 6 1; -#X connect 4 0 6 0; -#X connect 5 0 21 0; -#X connect 6 0 18 0; -#X connect 7 0 4 1; -#X connect 8 0 3 1; -#X connect 9 0 7 0; -#X connect 10 0 8 0; -#X connect 12 0 1 1; -#X connect 12 0 15 0; -#X connect 13 0 0 0; -#X connect 14 0 13 0; -#X connect 15 0 14 1; -#X connect 15 0 20 1; -#X connect 16 0 17 0; -#X connect 17 0 15 0; -#X connect 17 1 15 1; -#X connect 18 0 11 0; -#X connect 19 0 22 0; -#X connect 20 0 1 0; -#X connect 21 0 3 0; -#X connect 22 0 20 0; -#X connect 25 0 4 0; -#X restore 81 409 pd test-signal; -#X text 69 357 sampler; -#X text 443 311 calculate noise mask; -#X obj 80 488 output~; -#X msg 462 338 \; make-mask 2000; -#X msg 316 348 15; -#N canvas 0 0 592 442 mask-table 0; -#N canvas 0 0 450 300 graph1 0; -#X array \$0-mask 512 float 0; -#X coords 0 500 511 0 400 300 1; -#X restore 110 76 graph; -#X text 25 14 This table ($0-mask) is the average power measured in -each channel of the spectrum \, presumed to represent the noise floor. -; -#X restore 331 500 pd mask-table; -#X text 80 322 amplitudes (dB); -#X text 68 26 This patch attempts to scrub the noise floor from a sample -in two steps. First using the "make-mask" message (which is caught -in the "fft-analysis" window) \, you estimate the background spectrum. -You would normally do this at a moment when only the background noise -is audible. Then \, turn on "masking" (to 15 by default \, but try -other values) and the patch will try to clean the background noise -out of a signal.; -#X text 67 149 For this demonstration \, you control the amplitudes -of a looping sample and a filtered noise source. Normally you'd hit -"calculate noise mask" with only hte noise turned on \, then turn both -the noise and the sampler on \, and also "masking" \, to see if the -patch can clean the noise out of the signal. Open the "fft-analysis" -window to see the algorithm \, or the "insample" window to change samples -\, or "mask-table" to see the current mask (the average signal power -of the noise to clean out of the signal).; -#X connect 0 0 6 0; -#X connect 1 0 13 0; -#X connect 2 0 16 0; -#X connect 2 0 16 1; -#X connect 7 0 13 1; -#X connect 12 0 0 0; -#X connect 13 0 2 0; -#X connect 18 0 0 0; -- cgit v1.2.1