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"Estradin 230 is an almost identical copy of the famous Moog Minimoog, made in the Soviet Union. Estradin 230 is powerful monophonic 3'osc synthesizer produced by Estradin military radio plant in 1985 in Zhitomir city. Synth has 4-oct keyboard (F-C) with velocity sensitivity assign to vibrato effect. For live performance there is a wheel which provides pitch shift (called glissando). Synthesizer is based on 3 VCO (OSC-3 can work as the modulator), 1 VCF (lowpass 24dB/oct) with ADSR, 1 VCA, LFO, noise generator (white/pink), portamento(glide), memory. It has an EXTERNAL INPUT allowing to use FILTER and GENERATORS with OTHER INSTRUMENTS such as guitars, synths, etc! Estradin 230 consist of 5 main sections - OSC'S, MODULATION, MIXER, FILTER and AMP (called Contour).

OSCILLATORS section:
- osc 1,2,3 registers - 2", 4", 8", 16", 32", Low Frequency
- osc 1,2,3 waveshape select - triangle, sawtooth, reverse sawtooth/ramp wave, square, two different width pulse waves
- osc frequency - freq 1..3, freq 2, freq 3 -linked to keyboard pitch on/off
- modulation on/off switch

MODULATION section:
- portamento on/off, rate;
- mod mixer knob: balance between modulated by OSC3 and noise, depth amount;
- vibrato on/off, octave shift to 1/2
- pitch wheel (glissando)
MIXER section:
- osc 1,2,3 on/off, level
- ext input level, on/off
- noise generator level, on/off
- noise mode switch: white/pink

FILTER section:
- mod on/off
- cutoff, resonance, brightness
- attack, decay, sustain, release
- keytrack on/off
AMPLIFIER section:
- attack, decay/release, sustain
- key hold memory on/off
GLOBAL section:
main volume, phones volume, phones out, A-440Hz tone on/off, power.
CONNECTIONS: All connections has 5Din sockets - Line input, Line output, Phones out, MIDI input and MIDI thru. But i will include in set two professional 5Din to standart 1/4 Jack adapters.
POWER SUPPLY 220-240V/50Hz, fuze 0,125A. For use with 110/127V, a voltage converter is necessary\ not added."