Exactly , rectifying is not just adding a constant offset , it is in fact mirroring the negative phase upwards–> positive .
If you’ll look at the screenshot you’ll see that the negative portion of the saw wave is flipped , it becomes a triangle with positive energy only , the ripples are because of the resonance .
Some verry mild hp filtering to get rid of dc offset, a log value of 2 is about 5 hz ( out of my head ) .
Do the following test , draw a saw wave and select the distortion module ( don’t change anything ) , set to shift and look at the osciloscope …what do you see/hear …?
A triangle wave ( witth a spike in the middle ) , the shift algoritm is also using a rectifier .
Now add a low pass filter before the distortion it …et voila
Scream filter = low pass filter + distortion in shift mode .
Problem solved …
Thread can be closed
Thanks for the hint, will test if it works for my drum synthesis and some other instruments i made using sream filter…