Reaktor - Modulo on audio

gentleclockdivider · 2024-04-20T16:45:53+00:00

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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 .

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Comments

gentleclockdivider

SO a modulo in core is this , works fine for events and integers but not for audio .

The division is integer (floor ) and outputs a zero , so nothng is multiplied and input is same as output

When division is float , then output is silence ( logically becasue ot the algo )

Any help appreciated

colB

https://community.native-instruments.com/discussion/comment/148231#Comment_148231

The trick is to use a float divide, then stick the 'floor' process after that. Floor is pretty straight forward, just an f2i for rounding to integer, then check if the f2i has rounded up, subtract 1 if it has.