The Altair-231 monophonic synthesizer was produced in the 1980s of the 20th century by the Zhytomyr Electrical Meter plant.
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The synthesizer is designed to play sounds of various kinds - from simulating the sounds of natural instruments, to obtaining complex synthesized tones, effects, percussion sounds ... The synthesizer has a 4-octave keyboard, pitch control wheel, parameter controls on the front panel, output to phones,
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pedal input.
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It consists of four main blocks of sound synthesis - Generators, Mixer, Filter, Circuit.
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The synthesizing part is based on 3 master oscillators, each with independent parameters of the registers, waveform, modulation frequency.
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There is a generator of white and pink noise.
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A low-pass filter with basic parameters allows tracking from the keyboard.
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The synthesizer includes a portamento function with speed control.
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For tuning the instrument there is a 440 Hz tone.
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A linear input is provided for connecting an external sound source.
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The inputs and outputs are made on 1/4 jacks.
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