ALTAIR 231 - Soviet Analog Synthesizer with MIDI ussr russian minimoog estradin (ID: alexstelsi)

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Listed:4 years ago
Sold By
Vintage Audio Gear Store
Europe, Ukraine
Joined Reverb

Up for sale is legendary, very rare & powerful soviet analog synthesizer "ALTAIR-231". It is a 3-OSC monophonic precise equivalent of infamous western MINIMOOG MODEL D, produced in the USSR in 1986 by Elektroizmeritel military factory in Zhitomir. Altair-231 is a refined version of another well-known soviet analog synthesizer Estradin-230. Both synths has identical electronic architecture, functionality and rich sound palette. Estradin-230 was manufactured from early to middle eighties and then Estradin factory changed synth`s design (new casing) and labelled it as "Altair-231". So Estradin-230 & Altair-231 are the same machines only in different bodies.

Synth has 4-octave keyboard (F-C) with velocity (sensitivity assign to vibrato effect). For live performance there is a wheel which provides pitch shift. ALTAIR-231 is based on 3-VCO (OSC-3 can work as the modulator), 1 VCF (lowpass 24dB/oct) with ADSR, 1 VCA, 3 LFO, noise generator (white/pink), glide, memory. It has an EXTERNAL INPUT allowing to use FILTER and GENERATORS with OTHER INSTRUMENTS such as guitars, synths, etc! ALTAIR-231 consists of 5 main sections - OSC, MIXER, MODULATION, FILTER and AMP.
(for all technical specifications check the "Features" section below).

The inclined desk is divided into the following functional sections: Modulator, Generator #1, Generator #2 or #3, Mixer and Amplifier. They give one a possibility to synthesize a broad spectrum of sounds and to change sounding at any time.
There are 3 internal audible signal sources in the instrument: to broad-ranged of the Generators with changed form of oscillations and a noise generator for creating a non-musical sounds such as wind, surf, whine, etc.

Possibility to connect an external audible signal sources to the synthesizer is provided for (e.g. guitars, electro pianos and electro organs). Sounds of different external sources are combined separately in the mixer in any ratio. There is a filter in the synthesizer with cutoff frequency control to change color of timbre of audilble signal over a wide range.

Both Estradin synths have fat and rich vintage analog sound with it`s own character and can be compared to Minimoog model D synthesizer.

ALTAIR-231 is one of the most impressive vintage Soviet synthesizers. It has inimitable peculiar sound and very powerful filters. A fat, lush and very analogue sound with the unique architecture of the Soviet-era components; in addition, highly reliable military technologies were applied in the process of production. The synthesizer is universal & may be used for hard electronic music, or for soft ambient/old school projects and for modeling various effects as well...endless possibilities

- Adds MIDI IN & THRU connectors
- MIDI LEARN button input for fast and easy active midi channel selection

The mains power of the synth is 220 volts. For 110/127v countries I`ll include voltage converter.

- Extremely rare in its refurbished 100% working "midified" condition
- Professionally serviced, tested & tuned
- MIDI Interface installed
- Standard 1/4 TRS "Jacks" installed
- 110/127 Volts support
- Professionally packed & shipped by insured air mail
- Years of experience & seller reputation



: 3 osc, 1 Noise Gen
Oscillator (1,2,3) registers: 2", 4", 8", 16", 32", LF
Waveforms: triangle, sawtooth, reverse sawtooth/ramp wave, square, two different width pulse waves
Osc frequencies: freq 1..3, freq 2, freq 3 -linked to keyboard pitch on/off

- 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)

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

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

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

main volume, phones volume, A-440Hz tone on/off, power.

- MIDI Control: MIDI interface installed (MIDI-In\Thru - 5din sockets)
Keyboard: 44 notes, keyboard (F-C)
Special effects:
"Touch vibrato" function installed
- phones(TRS jack), line out (TRS jack)
Inputs: line in (1/4TRS) & pedal (5-din)
Mains voltage
- 220V
(For use with 110/127V, a voltage converter will be included)

78x36x18 cm (30x14x7 in)

17 kg (38 lbs)



- ALTAIR-231 Synth
- Manual/Passport and schematics.
- Front panel translation
- Voltage converter (for countries with 110/127v)


ALL MY ITEMS ARE POSTED Worldwide (Professionally carefully packaged).Terms of delivery approx. 1-3 weeks (usually 10-15 days to USA, 7-10 days to Europe, 18-25 days to Australia). (AirMail with tracking number)

This item is sold As-Described

This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Items must be returned in original, as-shipped condition with all original packaging.Learn More.

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