images via this auction"It was made in USSR at Zhitomir factory "Estradin" in April of 1986. 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." Audio at the aution while it is up.
copied from a minimoog and nearly priced like one
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