1 pole lowpass filter

borodadada · Post by **borodadada** » Fri Jul 17, 2015 12:21 pm

Hello guys, i want create simple filter use site http://www.micromodeler.com/dsp/, but i dont understand how work parametr start freq 0 - 0.5
http://rghost.ru/7zqvqbL2L/image.png

martinvicanek · Post by **martinvicanek** » Sat Jul 18, 2015 2:54 am

I have an article on filters at http://flowstone.guru/blog/digital-filt ... mechanics/ which you may find useful. You can also download a set of 1 pole filters here: http://flowstone.guru/downloads/first-o ... e-filters/ .

borodadada · Post by **borodadada** » Sat Jul 18, 2015 9:02 am

In 1 pole LP filter.

stage(0)
{
abs = 3.4e38|0.999999|0.1;
}

which means this line ?

out  = ((out&abs) > 1e-11)&out;

and this
1e-11 ?

martinvicanek · Post by **martinvicanek** » Sat Jul 18, 2015 12:08 pm

That is a way to prevent denormals, see viewtopic.php?f=4&t=2808#p14876