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    The Estradin-230 is a 3 oscillator monophonic analog synthesizer produced in the USSR from the early 1980's until 1985 by Elektroizmeritel military factory in Zhitomir. The Estradin-230 was the forerunner to the Altair-231 which shares the same architecture and functionality. The Estradin factory changed the instrument`s casing and renamed it Altair-231.

    The instruments offers a 49 key keyboard with velocity sensitivity. The structure of the synthesizer is 3 oscillators with oscillator 3 as a modulator, a white and pink noise generator and external audio input as additional sources. It features a 24db/oct lowpass voltage controlled filter and voltage controlled amplifier. 3 LFO generators, glide and a pitch wheel. The Estradin-230 was the Russian answer to the Minimoog.
    Type: Analog
    Synthesis: Subtractive
    Oscillators: 3
    Waveforms: Pink Noise, Saw Up, Triangle, White Noise
    Osc Modulation: Input, Knob, LFO, Velocity
    Envelopes: 1
    Evelope Paramerters: Attack, Decay, Sustain
    Filters: 1
    Types: 24dB Slope (4-pole), Low Pass, Resonance
    Filter Modulation: Knob, LFO
    LFO: 1
    Polyphony & Tuning
    Polyphony: 1
    Timbrality: 1
    Tuning: Standard
    Modes: Mono
    Patches RAM: 1
    Case: Keyboard
    Keyboard: 49 keys
    Controls: Modulation - Audio Input, Knobs, Sliders
    Audio Output Connections: 1/4" Phone Jack, Mono Out, Mono Headphone
    Audio Output Count: 2
    Inputs: 1 1/4"
    Year Released: 1981
    Year Discontinued: 1985
    Manuals & Documents
    Used Price: $699-$1,500 - convert
    YouTube Videos

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