Reaktor - Modulo on audio

I was comparing the modulo on audio audio signals between pure data and reaktor primary .

Input signal : reaktor as sound source using stereo outputs going into reaktor as effect , left channel and right channel t going into modulo's input , same for Pure data .

Result : output of modulo recorded

There is a major difference , it seems that reaktor modulo input is automaticall rectifying negative signals , which is pretty weird considering audio signals are mostly bipolar .

Here is an audio input file , the left channel goes ( bipolar sin ) goes into left input modulo , the right channel(unipolar neg.rectifoied sine ) goes in second input of modulo .

The reakto result is negative unipolar ony , while pure data's is bipolar .

BUt it gets interesting once the left channel is negative unipolar , and the right channel bipolar

INput sgnal

So ....let's go the core route , which has no modulo at all and I am stuck building one .