Nitrox Overview

[Nitrox 1.11]

What is Nitrox?

Nitrox is an analog type syntheziser with three oscillators, two stereo filters and a fully equipped stereo effects bank. The unique thing about Nitrox is its comprehensiveness paired with high flexibility and numerous modulation possibilities. The oscillators, filters and effects have been implemented with sound quality in mind.

Nitrox comes in two versions: there is a stand-alone version which can be connected to a stereo audio output channel and to multiple MIDI input channels which is called Nitrox solo. The second version is a VST(TM) plug-in simply called Nitrox.


Nitrox is designed for growing that is adding features and functionalities but guaranteeing that the existing patches will still work. See the version history for details about the current version.

Requirements and Testing

A 2GHz CPU with SSE2 instruction set and 1GByte of RAM are recommended as a minimum. Nitrox is 32-bit Windows(TM) software being tested under Windows 7 and Vista. The VST host used for testing is Steinberg's Cubase. Nitrox conforms to VST version 2.4.

Donate, if you like it...

Nitrox 1.11 is donationware. You can download it from this site. Should you like the sound and the flexibility and use Nitrox on a regular basis please make a donation via the PayPal button in the left column.

The Basic Structure

The main window is split in seven areas and a tool bar on top. The seven areas are:

  1. oscillator area with OSC 1..3
  2. filter area with Filter 1 and 2
  3. effects bank area with Effect 1, 2 and 3
  4. preset area with description on four preset parameters
  5. ADSR area with ADSR 1..5
  6. LFO area with LFO 1..4
  7. additional modulation unit area for modulation of LFO parameters

The tool bar comprises several buttons for opening additional windows like

Signal Flow

Principally, the signal is generated in the oscillator area and then routed through the filter area and last but not least through the effects bank. For each component the signal routing can be configured individually via the parameter Output which is generally the parameter at the bottom of the component. Each component can route its signal to any downstream component. The signal of OSC 1 for example can be routed to the following destinations:

  1. Filter 1
  2. Filter 2
  3. Effect 1
  4. Effect 2
  5. Effect 3
  6. Output (which is the overall output of Nitrox)

Filter 1 has the following options:

  1. Filter 2
  2. Effect 1
  3. Effect 2
  4. Effect 3
  5. Output

Note, that the oscillators and the filters are polyphonic, i.e. assigned to voices. The effects bank, in contrast, is monophonic, i.e. the signals of all voices are mixed before entering the effects section.


The most basic modulation sources are the ADSRs 1..5 and the LFOs 1..4 which are located in the main window together with a modulation area which enables the modulation of some of the LFOs parameters. There are also five custom envelopes which reside in a separate window accessible via the respective tool bar button.

These modulation sources can be used to modulate all of the oscillator parameters, the filter parameters and some parameters of effects in the effects section.

Note, that ADSRs and custom envelopes are polyphonic, i.e. assigned to voices, whereas the LFOs are monophonic, i.e. synchronous for all notes played concurrently.


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