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 --- .../doc/3.audio.examples/C07.envelope.follower.pd | 113 --------------------- 1 file changed, 113 deletions(-) delete mode 100644 desiredata/doc/3.audio.examples/C07.envelope.follower.pd (limited to 'desiredata/doc/3.audio.examples/C07.envelope.follower.pd') diff --git a/desiredata/doc/3.audio.examples/C07.envelope.follower.pd b/desiredata/doc/3.audio.examples/C07.envelope.follower.pd deleted file mode 100644 index 51f8f56b..00000000 --- a/desiredata/doc/3.audio.examples/C07.envelope.follower.pd +++ /dev/null @@ -1,113 +0,0 @@ -#N canvas 66 7 617 909 12; -#X text 164 5 ENVELOPE FOLLOWERS; -#X text 10 25 The env~ object reports ths RMS signal level over the -last 256 samples (by default) or any other power of 2 that's at least -twice the block size. The analysis is done in an overlapped fashion -so that results appear every N/2 points if N is the analysis window -size. So the larger the window \, the stabler the result and the less -frequently it appears. Computation time doesn't depend heavily on N. -; -#X text 11 135 Envelope followers are frequently used to detect attacks -and periods of silence. (There are fancier attack detectors out there -\, though.) Here is a simple threshold-based attack and rest detector. -; -#X obj 102 297 dbtorms; -#X obj 23 293 osc~ 440; -#X obj 23 339 env~; -#X floatatom 78 329 0 0 0 0 - - -; -#X floatatom 102 274 0 0 0 0 - - -; -#X msg 451 320 \; pd dsp 1; -#X obj 119 380 t b f; -#X floatatom 119 403 0 0 0 0 - - -; -#X obj 126 458 pack; -#X obj 126 481 route 0 1; -#X obj 126 504 > 55; -#X obj 176 504 < 45; -#X obj 126 527 sel 1; -#X obj 176 527 sel 1; -#X msg 90 538 1; -#X msg 90 516 0; -#X obj 126 564 print attack; -#X obj 119 435 != 0; -#X obj 24 612 t b f; -#X floatatom 15 638 0 0 0 0 - - -; -#X obj 27 688 pack; -#X obj 27 711 route 0 1; -#X obj 27 749 sel 1; -#X msg 6 856 1; -#X msg 7 879 0; -#X obj 20 666 != 0; -#X obj 58 639 < 45; -#X obj 31 783 timer; -#X obj 113 712 sel 0; -#X obj 95 832 sel 0; -#X obj 45 832 sel 1; -#X obj 45 873 print rest; -#X obj 31 806 > 1000; -#X text 162 403 state -- 1 if waiting for low threshold \,; -#X text 199 418 0 if we've attained it and now want the; -#X text 202 434 high one.; -#X text 209 480 route the RMS value according to state; -#X text 239 506 if off \, 55 dB means attack. If on \, 45; -#X text 240 527 dB or less means state changes to off.; -#X text 132 359 ATTACK DETECTION; -#X text 40 594 REST DETECTION; -#X text 100 637 Here we always will test RMS against a low value; -#X text 125 654 but as before we route the result according to; -#X text 147 671 our state \, 1 if "resting" \, 0 if not.; -#X text 163 709 regardless of state \, when RMS isn't low; -#X text 185 724 reset the timer; -#X text 202 846 RMS isn't low enough.; -#X text 120 744 If we're not in rest \, and the RMS is low \,; -#X text 143 761 check elapsed time sinse RMS last wasn't low.; -#X text 122 802 If more than 1 second \, report a rest.; -#X text 170 828 If we're at rest \, pop out of it when; -#X text 11 201 Both detectors are state machines with two states \, -on and off. If on \, a test is run to determine whether to turn off -\, and vice versa. The tests are run at each output of the rms~ object. -; -#X text 355 884 updated for Pd version 0.37; -#X text 109 320 note 3.01 dB difference between; -#X text 113 336 peak and RMS amplitudes.; -#X obj 451 297 loadbang; -#X obj 23 316 *~; -#X connect 3 0 59 1; -#X connect 4 0 59 0; -#X connect 5 0 6 0; -#X connect 5 0 9 0; -#X connect 5 0 21 0; -#X connect 7 0 3 0; -#X connect 9 0 10 0; -#X connect 9 1 11 1; -#X connect 10 0 20 0; -#X connect 11 0 12 0; -#X connect 12 0 13 0; -#X connect 12 1 14 0; -#X connect 13 0 15 0; -#X connect 14 0 16 0; -#X connect 15 0 17 0; -#X connect 15 0 19 0; -#X connect 16 0 18 0; -#X connect 17 0 10 0; -#X connect 18 0 10 0; -#X connect 20 0 11 0; -#X connect 21 0 22 0; -#X connect 21 1 29 0; -#X connect 22 0 28 0; -#X connect 23 0 24 0; -#X connect 24 0 25 0; -#X connect 24 1 32 0; -#X connect 25 0 30 1; -#X connect 26 0 22 0; -#X connect 27 0 22 0; -#X connect 28 0 23 0; -#X connect 29 0 23 1; -#X connect 29 0 31 0; -#X connect 30 0 35 0; -#X connect 31 0 30 0; -#X connect 32 0 27 0; -#X connect 33 0 26 0; -#X connect 33 0 34 0; -#X connect 35 0 33 0; -#X connect 58 0 8 0; -#X connect 59 0 5 0; -- cgit v1.2.1