Collide 4

A quadrature spectral computer in 20 HP, co-developed with Hainbach: a fully analogue Eurorack re-imagining of the lock-in amplifier, as a synth voice and an audio processor. A pingable variable-bandwidth filter that self-oscillates sits between pre- and post-filter gain stages worth up to 130 dB of amplification; a through-zero sine/cosine quadrature oscillator, a Hilbert transform network for frequency shifting and dual ring modulators with output lowpass filters feed an X/Y quadrature output section with sum, difference, magnitude and phase outputs, suited to stereo. A level/overload lamp, dual-colour LEDs on the outputs, CV over every parameter with temperature-compensated volt/octave tracking, and trimmers reachable from the front panel.