Two Maths channels cross-triggered produce 90-degree phase-shifted LFOs (quadrature mode)

Maths can generate two LFOs 90 degrees apart (quadrature) by patching the End of Rise of CH.1 to Trigger IN of CH.4, and the End of Cycle of CH.4 to Trigger IN of CH.1, with both CYCLE switches off. Once one channel is briefly triggered to start, they sustain each other. The two Signal OUTs produce functions shifted by ninety degrees. Applying these to separate modulation destinations creates stereo-width or choreographed motion. This is a classic Buchla 281 technique carried over to the Maths.

Examples

Patch CH.1 EOR → CH.4 Trig IN. Patch CH.4 EOC → CH.1 Trig IN. Briefly engage CH.1 CYCLE to start. Apply CH.1 and CH.4 Signal OUTs to two different VCA or filter destinations.

Assessment

Explain why patching EOR of one channel to TRIG of the other creates a 90-degree phase offset rather than a synchronized output.