Infrequent Sound [sex.tex] technology: Moog

Link: moogmusic Owner's Manual

Monophonic Bass Synthesizer

Each function has its own control element
Two VCOs with sawtooth waves (exactly the original Taurus respectively) and additional square waves
Mixer for VCO signals
Moog Ladder Filter delivers authentic Taurus1 and Taurus 3 sounds
Two ADSR envelope generators in the Minimoog-Style
LFO controls VCO and VCF - MIDI clock sync
Minitaur's sound generator can be fully controlled via MIDI
USB port and a MIDI-DIN plug
Analogue control inputs for pitch
Filter volume and gate - allow control through pedals and control voltages (everything from Moogerfooger to modular synthesizer)
Audio input for processing external audio signals through filter and mixer section
Headphone output
High-quality sheet steel housing
Rev2
Audio output: 6.3 mm mono jack, unbalanced

Link: ruskeys

Monophonic synthesizer Altaiir 231 (Estradin factory, Zhitomir city) is intended to play different sounds from the imitation of natural instruments to complicated synthesized electronic timbres, sound effects, percussion sounds & so on. There are a four-octave keyboard & a wheel to pitch control. There are also controls for parameters on the front panel, an output for phones, an input for a pedal. The instrument consists of four main blocks of sound synthesis - Generator, Mixer, Filter and Contour.

Synthesis is based on 3 master oscillators (each of them with different parameters of registers) waveform, frequency modulation. There is also a generator of white & pink noise. Low-pass filter with main parameters gives the possibility for keyboard tracking. Portamento adjustment knob is provided. To tune a pitch the tone signal is used (440Hz) It provides a linear input to connct an external sound source to Altair. Output and input sockets are 1/4" jacks

ALTAIR-231 is a Soviet Minimoog equivalent. If you are familiar with Soviet synths you might know that ESTRADIN-230 has absolutely identical schematics (all 6 PCBs) with ALTAIR-231.

ALTAIR-231 is powerful monophonic 3-OSC synthesizer produced by Elektroizmeritel, millitary radio plant in Zhitomir, USSR, 1986. 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.

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 (OSC 3 ONLY as MAIN OSC)

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

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

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

global section: main volume, phones volume, phones, A-440Hz tone on/off, power.
Connections: input, output, pedal input, phones.
Power supply: 220V/50Hz, 127V; fuze 0,125A

Dimensions (mm) 754x466x110 (29.6"x18.3"x4.3")
Weight: ~ 18 kg (39.68 pounds)