Published on Nov 9, 2016 Strangesoundful
SN 3346 via this auction
"Monophonic synthesizer Altair 231 (Estradin factory, Zhitomir city, 1986 year) have a four-octave keyboard and a wheel to pitch control. 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 and 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)."
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