Formanta • Polivoks

The Polivoks is the most popular vintage Russian synth made in the early 80's and it was among the first synthesizers produced in the USSR. It's purely analog with two voices of polyphony, two oscillators each with triangle, square, saw, two types of pulse waveforms and one noise generator, the levels of which are controlled via the internal mixer. Although the oscillators can become unstable and difficult to tune, the Polivoks is well suited for making screeching sounds and thunderous bass. You can also connect an external audio input for processing through the Polivoks' switchable dual-mode band pass/low pass filter and LFO sections. The LFO, or "Modulator" offers triangle, square, random and noise waveshapes and can be applied to the oscillator level and pitch or the filter cutoff. There are also two ADSR envelopes for contouring the oscillators and filters.
Polivoks had been produced since 1982 by the Formanta electronic factory (one of the biggest at the time); it was sold exclusively in the USSR. Polivoks has its own unique electronic components including a reliable keyboard (49 notes F to E) made with magnetically controlled contacts. Its synthesis modules consist of independent circuit boards, which is convenient for maintenance and repair. In addition, Polivoks is housed in an original rugged aluminum body of uncommon design with handy controls.
One more thing though, if you come across one of these it helps if you can read Russian. Check out this Panel Layout Translation to English.
About it's unreliability... that's not true, each 20-30 years old synth needs at least cleaning and recapping with changing electrolytes. If you restore it to initial condition, it will work and sound perfect!
Polivoks is very unique and amazing synth, so is one more Russian beast called Aelita.
1)It's impossible to scale VCO 2 perfectly on mine - I get about 2 usable octaves at most
2)Several vital pots are so incredibly scratchy and filthy, live tweaking is not an option
3)The LFO speed range is very limited
It takes about 30 minutes to warm up into tune, the vertical switches feel kind of cheap, and nearly all the knob ranges are only about 40 percent used. It has crossmod(VCO2 to VCO1), but only seems to really work if VCO2 is a lower octave. It sounds monstrous through a keyboard amp. It’s freaky-deaky!