ALTAIR 231 SOVIET SYNTH

via this auction

"I SELL SUPER LEGENDARY AND VERY RARE SOVIET ANALOG SYNTHESIZER, MADE IN CCCP BY "ESTRADIN" MILITARY PLANT AT 1985 YEAR - CALLED
ALTAIR-231

You can NOT find this synthesizer even in Russia now! It is a "Russian Minimoog", no comments! However this synth is better than classical Minimoog or Oberheim, it has a more aggressived Russian devil filters!!! Plus the additional unique synthesis architecture include the best of USSR synth's era quality military engineering! Throw out yours Polivoks or any famous keys and enjoy this mega synth!

ALTAIR-231 is a monophonic 3'osc synth, it has 4-oct keyboard (F-C) with velocity sensitivity assign to vibrato effect. Sound control is performed with round knobs and switchers. For live performance there is a wheel which provides pitch shift (called glissando).

Synthesizer is based on 3 VCO (any can work as the modulator), 1 VCF (lowpass 24dB/oct) with ADSR, 1 VCA, 3 LFO, noise generator (white/pink), portamento. Consist of 5 main sections - MODULATION, OSC'S, MIXER, FILTER and AMP (called Contour).

MOD 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)

OSCILLATORS section:
- osc 1,2,3 registers - 2", 4", 8", 16", 32", LF
- osc 1,2,3 waveshape select - triangle, saw, square, pulse, sine
- osc frequency - freq 1..3, freq 2, freq 3 -linked to keyboard pitch on/off
- modulation on/off switch

MIXER:
- osc 1,2,3 on/off, level
- ext input level, on/off
- noise generator level, on/off
- noise mode switch: white/pink

FILTER:
- mod on/off
- cutoff, resonance, brightness
- attack, decay, sustain
- keytrack on/off

AMPLIFIER:
- attack, decay, sustain
- key hold memory on/off

Next - global section: main volume, phones volume, phones out (5din), A-440Hz tone on/off, power.

Connection 1/4 jacks: input, output, pedal input (5din), ground.
Power supply: 220V/50Hz, fuze 0,125A"

You can find audio demos on Ruskeys.