[PD] limiter questions

[Mirko Maier]

Hi Derek,

> 1) Is there any reason not to use [limiter~] (i.e. to stay Vanilla)?

I would like to understand it! And [limiter~] also produces a dampening not in the right moment (my 2nd question).

> 2) To avoid clicks, look at:
> 
> [num\
> |
> [pack 0 50]
> |
> [line~]

That doesn't work in my patch, there is still a big peak when i give a short (10 ms) loud sound.

> 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!!!!

Ok, so which object can be used for that?

> 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 

Of course, that would be good. Isn't that possible with pd vanilla or at least with a selfmade-patch using objects from pd extended?

cheers
mirko

> 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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