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

T-ZED

OSCILLATOR

LR4

CROSSOVER

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.

WFM 

OSCILLATOR

MACA

FILTER

4-pole multimode filter

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