This demo consists of 2 parts. First, the slow beginning / ending > mystic Streichfett strings. Second, the middle part, whereby the Stringfett goes through the GRP A4 synthesizer (stereo VCF modulation by the GRP Sequencer).
Ok, ok, this is Streichfett with Elka Synthex and Oberheim OB-8.
Waldorf Streichfett and Elka Synthex (with its unique step-sequencer).