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Astra Turbo Quasar VST, VST3 and Audio Unit Plugin: Dual Phase Distortion Synthesizer: Leads, Pads, Keys, Atmos, Ambient Textures, Soundscapes (Windows, macOS)

Astra Turbo Quasar is a dual phase distortion synthesizer that dynamically change the harmonic content of a carrier waveform by influence of another modulator waveform. It can be used to create spacey pads, synth keys, leads, atmospheric textures and ambient soundscapes.


  • Two Phase Distortion Oscillators: Offers 16 different single-cycle waveforms per channel.
    • Modulation Depth: Controls the wave shape distortion for left and right channels. The values can be changed by turning the slider or by entering a value from the keypad and pressing enter key.
    • Waveshaper Section: These combo boxes presents a double selectable wave shapes with 5 basic waveforms: sawtooth, square, pulse, double sine and sawtooth-pulse plus 3 resonant waveforms: resonance 1 (sawtooth), resonance 2 (triangle) and resonance 3 (trapezoid). Provides independent controls for the left and right channels.
  • ADSR Envelope Generator: A four stage envelope generator with independent control over each stage: attack, decay, sustain and release.
  • Envelope Modulator.
  • Filter Section: A smooth state variable filter with cutoff frequency, resonance and filter mode to switches the filter between lowpass, highpass, bandpass, or band-rejection filter types, offering a simple and effective tone control to shape and color the sound source.
  • Low-Frequency Oscillator: The LFO rate and depth modulates various aspects of the audio signal, you can apply effects such as vibrato or tremolo.
  • Reverb/Ambience: Brings a sense of spatial depth and width to sound, from small to huge sounding spaces.
  • Loudness: Adjusts the volume (amplitude control).
  • Dual Delay: Stores the input signal and plays it back after a certain amount of time, creating from a subtle echo to a pronounced blending of previous sounds with new sounds. Improves the stereo image by adding a slight delay to one of the channels. Parameters includes:
    • Amount: Controls how much delay is applied to the signal, which is to be delayed.
    • Time: Modulation to vary the delay time dynamically, to control independently the left and right channels. Time can be changed by turning the knob or by entering a value from the keypad and pressing enter key.
    • Feedback: Regeneration of delay, to control independently the left and right channels. The values can be changed by turning the knob or by entering a value from the keypad and pressing enter key.
  • Mono Mode: Possibility of turn the synth into monophonic mode.
  • Glide: The rate at which portamento slides the pitch between two notes, when playing in monophonic mode.
  • MIDI automation: Implementation of MIDI Continuous Controller parameters for use with external hardware control via DAW.
  • Preset Manager: 'Browser' to load and save presets and banks, enabling to export to *.fxp (VST2 Preset), *.fxb (VST2 Bank), *.vstpreset (VST3 Preset), *.aupreset (Audio Unit Preset) plus two generic formats (plain text).
  • 30 presets.
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