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Analogue through-zero phase modulation oscillator based on the SSI2130 integrated circuit.


Function generator with VC gate duration synched to a decay envelope with trigger delay and an integrated S&H for controlled modulation. 

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4-pole multimode filter

based on the SSI2140, an updated version of the classic SSM2040 integrated circuit.


Voltage controlled 3-way crossover with 24/db filter slopes.


Triangle core analogue VCO with a waveshaper derived from the RSF Kobol synthesizers of the 1970s.

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