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Diffstat (limited to 'desiredata/doc/3.audio.examples/I05.compressor.pd')
-rw-r--r-- | desiredata/doc/3.audio.examples/I05.compressor.pd | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/desiredata/doc/3.audio.examples/I05.compressor.pd b/desiredata/doc/3.audio.examples/I05.compressor.pd new file mode 100644 index 00000000..10fe3375 --- /dev/null +++ b/desiredata/doc/3.audio.examples/I05.compressor.pd @@ -0,0 +1,237 @@ +#N canvas 557 371 620 428 12; +#N canvas 297 254 646 523 fft-analysis 0; +#X obj 115 409 *~; +#X obj 75 409 *~; +#X obj 76 114 *~; +#X obj 77 88 inlet~; +#X obj 76 137 rfft~; +#X obj 75 466 *~; +#X obj 171 177 *~; +#X obj 75 432 rifft~; +#X obj 75 489 outlet~; +#X obj 137 177 *~; +#X obj 137 200 +~; +#X obj 461 85 block~ 1024 4; +#X obj 137 351 clip~; +#X obj 178 306 r squelch; +#X obj 110 114 tabreceive~ \$0-hann; +#X obj 177 329 expr 0.01*$f1*$f1; +#X obj 461 116 loadbang; +#X obj 137 381 *~ 0.00065; +#X obj 137 225 +~ 1e-20; +#X obj 136 262 q8_rsqrt~; +#X obj 109 466 tabreceive~ \$0-hann; +#X text 31 5 As in the previous patch \, this works by multiplying +each channel of the Fourier analysis by a real number computed from +the magnitude. If the magnutude is "m" \, the correction factor is +1/m \, but only to an upper limit controlled by the "squelch" parameter. +; +#X text 211 174 squared magnitude; +#X text 219 225 protect against divide-by-zero; +#X text 223 261 quick 8-bit-accurate reciprocal square root; +#X text 222 277 (done by table lookup - about 0.25% accurate); +#X text 193 351 limit the gain to squelch*squelch/100; +#X text 238 381 normalize for 1024-point \, overlap-4 Hann; +#X text 151 409 multiply gain by real and complex part; +#X text 152 429 of the amplitude; +#X text 130 137 outputs complex amplitudes; +#X msg 461 139 \; pd dsp 1 \; window-size 1024 \; squelch 10 \; squelch-set +set 10; +#X connect 0 0 7 1; +#X connect 1 0 7 0; +#X connect 2 0 4 0; +#X connect 3 0 2 0; +#X connect 4 0 9 0; +#X connect 4 0 9 1; +#X connect 4 0 1 0; +#X connect 4 1 6 0; +#X connect 4 1 6 1; +#X connect 4 1 0 0; +#X connect 5 0 8 0; +#X connect 6 0 10 1; +#X connect 7 0 5 0; +#X connect 9 0 10 0; +#X connect 10 0 18 0; +#X connect 12 0 17 0; +#X connect 13 0 15 0; +#X connect 14 0 2 1; +#X connect 15 0 12 2; +#X connect 16 0 31 0; +#X connect 17 0 0 1; +#X connect 17 0 1 1; +#X connect 18 0 19 0; +#X connect 19 0 12 0; +#X connect 20 0 5 1; +#X restore 42 330 pd fft-analysis; +#X floatatom 57 196 0 0 500 0 - squelch-set -; +#X obj 57 220 s squelch; +#N canvas 190 43 427 657 test-signal 0; +#X obj 90 444 line~; +#X obj 90 369 f; +#X obj 90 524 outlet~; +#X msg 90 423 0 \, \$1 \$2; +#X obj 90 397 pack 0 0; +#X obj 190 344 /; +#X obj 317 295 * 0.001; +#X obj 90 497 hip~ 5; +#X obj 35 246 loadbang; +#X msg 90 322 1; +#X obj 90 344 metro 1000; +#X obj 259 272 t b b f; +#X obj 117 270 t b f; +#X obj 90 469 tabread4~ \$0-sample; +#X text 21 28 test signal: looped sample playback; +#X obj 67 131 hip~ 5; +#X obj 67 107 adc~ 1; +#X obj 129 131 s insamprate; +#X obj 67 70 inlet; +#X obj 129 107 samplerate~; +#X obj 116 246 r \$0-samplength; +#X obj 259 246 r \$0-insamprate; +#X obj 67 154 tabwrite~ \$0-sample; +#X connect 0 0 13 0; +#X connect 1 0 4 0; +#X connect 3 0 0 0; +#X connect 4 0 3 0; +#X connect 5 0 4 1; +#X connect 5 0 10 1; +#X connect 6 0 5 1; +#X connect 7 0 2 0; +#X connect 8 0 9 0; +#X connect 9 0 10 0; +#X connect 10 0 1 0; +#X connect 11 0 9 0; +#X connect 11 1 5 0; +#X connect 11 2 6 0; +#X connect 12 0 9 0; +#X connect 12 1 5 0; +#X connect 12 1 1 1; +#X connect 13 0 7 0; +#X connect 15 0 22 0; +#X connect 16 0 15 0; +#X connect 18 0 19 0; +#X connect 18 0 16 0; +#X connect 19 0 17 0; +#X connect 20 0 12 0; +#X connect 21 0 11 0; +#X restore 43 303 pd test-signal; +#X obj 43 359 output~; +#N canvas 388 86 722 350 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 259 24 graph; +#X obj 19 23 r read-sample; +#X obj 19 74 unpack s f; +#X obj 19 184 soundfiler; +#X text 356 250 read a sample; +#X obj 276 249 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 obj 19 47 t a b; +#X msg 276 273 \; read-sample ../sound/bell.aiff; +#X obj 29 208 s \$0-samplength; +#X obj 116 74 s \$0-insamprate; +#X obj 19 247 /; +#X obj 19 271 * 1000; +#X obj 19 294 s \$0-samp-msec; +#X obj 57 247 r \$0-insamprate; +#X connect 1 0 11 0; +#X connect 2 0 6 0; +#X connect 2 1 14 0; +#X connect 3 0 13 0; +#X connect 3 0 15 0; +#X connect 5 0 12 0; +#X connect 6 0 8 0; +#X connect 6 1 7 0; +#X connect 7 0 8 1; +#X connect 8 0 9 0; +#X connect 9 0 3 0; +#X connect 10 0 14 0; +#X connect 11 0 2 0; +#X connect 11 1 10 0; +#X connect 15 0 16 0; +#X connect 16 0 17 0; +#X connect 18 0 15 1; +#X restore 223 313 pd insample; +#X text 362 406 updated for Pd version 0.39; +#X text 56 43 Here we divide each complex channel in the Fourier analysis +by its own magnitude to "flatten" the spectrum. The "squelch" control +limits the amplitude boost the algorithm will apply. If infinite \, +you'll get a white spectrum. If less \, the louder parts of the spectrum +will be flattened but the quieter ones will only be boosted by the +squelch value.; +#X text 73 6 DYNAMIC RANGE COMPRESSION BY FOURIER ANALYSIS CHANNEL +; +#X floatatom 223 366 5 0 0 0 - #0-samp-msec -; +#X obj 43 282 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1 +-1; +#X text 62 281 <- record; +#X text 276 365 sample length \, msec; +#X msg 292 183 ../sound/bell.aiff; +#X msg 292 208 ../sound/voice.wav; +#X msg 292 233 ../sound/voice2.wav; +#X text 91 197 <- squelch; +#X text 295 161 change input sound; +#X obj 292 259 s read-sample; +#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 223 335 pd hann-window; +#X connect 0 0 4 0; +#X connect 0 0 4 1; +#X connect 1 0 2 0; +#X connect 3 0 0 0; +#X connect 10 0 3 0; +#X connect 13 0 18 0; +#X connect 14 0 18 0; +#X connect 15 0 18 0; |