Hi Mirko,
Is there any reason not to use [limiter~] (i.e. to stay Vanilla)?
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
- [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!!!!
- 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;