For the Polivoks sound - using authentic Russian components 20/10/15
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We've just had word of a forthcoming Dual Filter and Phaser unit from AVP Synth. Built using "authentic Russian components". The PolyRhythm features two separate filters plus an LFO and phaser. They go on to say that these filters are based on two famous Russian synths - if we had to guess, Polivoks and RITM-2, though they won't specifically say. The demo is uncharacteristically smooth, the Polivoks being well known for its abrasive driven sound - when, er driven.
Its not clear where you can buy this, but AVP Synth do have a Facebook Page where you can ask.