saturator take #2, now with tanh(x) !!!

ik · 23 Apr 2005

Hi! This is another (better) saturator using y=tanh(x). Get the file here: http://www.mindspring.com/~ikaldor/tanh(x)saturator.osm

For e^x approximation see: http://curta.org/wiki/LnAndE

and then: tanh(x)=(e^2x-1)/(e^2x+1)

The code: -------------------------------------------------------------------------- polyin in; polyin level; polyout out; float eexpx; float x;

x=2*level*in; x=x>=0&x+x<0&-1*x; eexpx=0.1*((10+10*x)+(x*x)*(5+2*x));//approx for e^x out=(eexpx-1)/(eexpx+1);//tanh(x) out=in>=0&out+in<0&-1*out;

//simple tanh(x) saturator

---------------------------------------------------------------------------

Enjoy, ik.