Hi Mirko,
1) Is there any reason not to use [limiter~] (i.e. to stay Vanilla)?
2) To avoid clicks, look at:
[num\
|
[pack 0 50]
|
[line~]
where 50 can be replaced with the interpolation time you choose to avoid
discontinuities. Output of [line~] can go to right inlet of [*~]. Using
discreet messages to manipulate an audio signal (as you have done at the
final [*~] in your patch) will certainly give clicks.
Details on using [line~] here:
http://en.flossmanuals.net/PureData/Amplifier
3) [env~] gives "RMS amplitude which (for a sinusoid) is about 3 dB
below peak-to-peak amplitude" (from the [env~] help patch). For a
limiter you are definitely interested in the peaks and not the average!!!!
4) For something like a limiter, you might want something which does
everything in the audio domain rather than switching between audio and
messages through signal analysis (for the reason I wrote
above...discrete messages give clicks). Again, [limiter~] would be the
best choice here.
best!
D.
Mirko Maier wrote:
hi list,
here's a limiter patch but it doesn't work.
i can calculate a limitation for decibels, but how can i adjust it to the original signal? and is it possible to avoid any click?
thanx for hints.
mirko
#N canvas 603 162 1007 794 12;
#X floatatom 426 284 5 0 0 0 - - -;
#X obj 174 585 *~;
#X floatatom 375 230 5 0 0 0 - - -;
#X obj 375 196 env~ 64;
#X obj 174 140 *~;
#X obj 173 38 osc~ 440;
#X obj 237 96 pipe 10;
#X msg 244 58 4;
#X msg 278 58 0.5;
#X obj 276 21 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
-1;
#X floatatom 402 87 5 0 0 0 - - -;
#X floatatom 426 345 5 0 0 0 - - -;
#X floatatom 321 404 5 0 0 0 - - -;
#X obj 298 374 *;
#X floatatom 349 457 5 0 0 0 - - -;
#X obj 301 638 env~ 64;
#X obj 175 261 z~ 64;
#X obj 375 255 moses 90;
#X obj 426 312 expr 90/$f1;
#X text 395 387 1st question:;
#X text 299 21 <- 2nd question: is it possible to really get no click?
;
#X text 390 414 it's no problem to limit the number stream (limit is
90db);
#X text 420 453 but it should be the same here! how convert?;
#X text 66 38 test signal;
#X text 454 86 any amplification \, e.g. 2;
#X obj 173 732 dac~;
#X connect 0 0 18 0;
#X connect 1 0 15 0;
#X connect 1 0 25 0;
#X connect 1 0 25 1;
#X connect 2 0 13 0;
#X connect 2 0 17 0;
#X connect 3 0 2 0;
#X connect 4 0 3 0;
#X connect 4 0 16 0;
#X connect 5 0 4 0;
#X connect 6 0 4 1;
#X connect 7 0 4 1;
#X connect 8 0 6 0;
#X connect 9 0 7 0;
#X connect 9 0 8 0;
#X connect 10 0 4 1;
#X connect 11 0 13 1;
#X connect 11 0 1 1;
#X connect 13 0 12 0;
#X connect 15 0 14 0;
#X connect 16 0 1 0;
#X connect 17 1 0 0;
#X connect 18 0 11 0;
--
::: derek holzer ::: http://blog.myspace.com/macumbista :::
http://www.vimeo.com/macumbista :::
---Oblique Strategy # 117:
"Make it more sensual"
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