how to add exponential/power function to bipolar signal?
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tester ·
When I have a bipolar stream like sinus tone (voltage from -1 to 1) - I'd like to add exponential function, that works in the same way to the positive (0 to 1) and negative (-1 to 0) range of my input shape. The sinus shape for example becomes then more impuls-like or thick. And I have no idea how to make it (and as aresult - still have both polarities). Exp function for streams works only for unipolar signals (which is of course logical); I just like to get the same effect effect on both sides of polarity.
In cool edit looks like this (see atachement) - above is "sinus ^ 4", and below is "sinus ^ 0.25". How to make it in SM properly?
trogluddite ·
Hi there,
The trick here is to fool SM into thinking that the signal is unipolar...
1) Store the sign.
2) Rectify the signal (i.e. ABS(x))
3) Perform your function.
4) Restore the sign.
e.g.
streamin in;
streamout out;
float polarity; float absolute;
//Get polarity and rectify
polarity = sign(in); //will be -1 or 1
absolute = abs(in); //rectify to all positive
//Your function here;
out = <some function of variable 'absolute'>;
//Restore sign
out = out * polarity;
tester ·
Thanks!
I'll check later, but looks easy to implement; I had similar thoughts regarding the concept of processing the signal, I just did not know how to make it in SM.
Have a nice weekend!
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