# Crossmod

### General information  


This Machine features a choice of different cross-modulation algorithms combining two of Antigone's voices to form a third one. The results can be hard to predict and this feature is more of a bonus to see what you can get out of the voices you have set up already.

<div drawio-diagram="208"><img src="https://nanopolis.storage.googleapis.com/uploads/images/drawio/2025-03/drawing-3-1741815638.png" alt=""/></div>

  
The cross-modulated output go into a [<span style="text-decoration: underline;">**Filter section**</span>](https://doc.nanopol.is/books/en-antigone-documentation/page/filter-section), then a Drive section and finally an [**<span style="text-decoration: underline;">Amp section</span>**](https://doc.nanopol.is/books/en-antigone-documentation/page/amp-section) before going to the[ <span style="text-decoration: underline;">**Mixer**</span>](https://doc.nanopol.is/books/en-antigone-documentation/page/mixer).. Go to the respective sections of the manual for more informations on the Filter and Amp Sections.

#### Main screen of the crossmod

[![screenshot_001.png](https://nanopolis.storage.googleapis.com/uploads/images/gallery/2025-03/scaled-1680-/Cy1screenshot-001.png)](https://nanopolis.storage.googleapis.com/uploads/images/gallery/2025-03/Cy1screenshot-001.png)

#### Input tab

Select the Carrier and Modulator voices using the first two knobs.

#### Crossmod tab  
  


<table border="1" id="bkmrk-width-phase-transfor" style="border-collapse: collapse; width: 100%;"><colgroup><col style="width: 24.9383%;"></col><col style="width: 24.9383%;"></col><col style="width: 24.9383%;"></col><col style="width: 24.9383%;"></col></colgroup><tbody><tr><td>**Vol In 1**</td><td>**Vol In 2**</td><td>**Algo**</td><td>**Timbre**</td></tr><tr><td>Controls the volume of the Carrier voice</td><td>Controls the volume of the Modulator voice</td><td>Select one of the 6 cross-modulation algorithms. Refer to the chart below for an overview of those.  
  
This parameter cannot be modulated.</td><td>Depending on the choosen algorithm, it changes the timbre of the sound.  
  
(crossfade between dry and modulated sound for example)</td></tr></tbody></table>

  
Cross-modulation algorithms reference :

<table border="1" id="bkmrk-xor-modulo-ring-modu" style="border-collapse: collapse; width: 100%; height: 59.2666px;"><colgroup><col style="width: 16.6667%;"></col><col style="width: 16.6667%;"></col><col style="width: 16.6667%;"></col><col style="width: 16.6667%;"></col><col style="width: 16.6667%;"></col><col style="width: 16.6667%;"></col></colgroup><tbody><tr style="height: 29.6333px;"><td class="align-center" style="height: 29.6333px;">**XOR**</td><td class="align-center" style="height: 29.6333px;">**Modulo**</td><td class="align-center" style="height: 29.6333px;">**Ring Modulation**</td><td class="align-center" style="height: 29.6333px;">**Ring Modulation 2**</td><td class="align-center" style="height: 29.6333px;">**Sub**</td><td class="align-center" style="height: 29.6333px;">**Negative - Positive**</td></tr><tr style="height: 29.6333px;"><td class="align-center" style="height: 29.6333px;">Performs cross-modulation between two audio signals using the bitwise XOR (exclusive OR) operation.</td><td class="align-center">Performs cross-modulation between two audio signals using the modulo operation.</td><td class="align-center">Performs a ring modulation between two audio signals.</td><td class="align-center">Performs a diode based ring modulation between two audio signals.</td><td class="align-center">Performs a gain then a substraction between two signals.</td><td class="align-center">Keep the positive part of the first signal, and the negative part of the second signal.</td></tr></tbody></table>

####   
How to use it ?

As it is a particular machine that require 2 others instruments as source to works, it can be more tricky to use.

What I recommend is to create 3 mono instruments:

- The first two instruments with the machines of your choice—load only the machines without envelopes to use them as oscillators.
- The third instrument with the crossmod machine.
- Configure the *Instrument Control* of each instrument so they respond to the same CV/Gate input or the same MIDI channel.
- In the crossmod machine, select *Voice 1* as the *carrier* and *Voice 2* as the *modulator* (corresponding to your mono instruments 1 and 2).
- You can add envelopes to the filter and a DCA in the crossmod machine.