MATRIXSYNTH: RARE ANALOG SOVIET SYNTHESIZER ALTAIR 231 with MIDI

Sunday, December 15, 2019

RARE ANALOG SOVIET SYNTHESIZER ALTAIR 231 with MIDI


via this auction

"Monophonic synthesizer Altair 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 connect an external sound source to Altair. Output and input sockets are 1/4" jacks"

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