Vintage ANALOG Soviet synth ALTAIR-231

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"Monophonic synthesizer Altair-231(plant Estradin Zhitomir) is designed for playback of sounds of various character - from simulation of natural sounds of the instruments to achieve complex synthesized electronic voices, effects, percussioni of sounds and so the Synthesizer has a 4 octave keyboard, wheel pitch, controls front panel settings, exit to the phones, the entrance to the pedals. Consists of four main blocks of synthesizing sound Generators, a Mixer Filter Circuit.

Synthesizing part is based on 3-setpoint generators, each with an independent parameters registers, waveform, frequency modulation. There is a generator of white and pink noise. The filter of low frequencies from main parameters allows tracking keyboard. Synth includes a feature portamento with speed adjustment. To configure the operation of the instrument is the inclusion of a 440Hz tone. Provides a line-in input for external audio source through the Altair-231. Inputs and outputs are 1/4 of the Jack."