live-coding-academy_ ⌕ search
home/ atoms/ maths-voltage-mirror

Maths mirrors a control voltage around an offset point by inverting it on one channel and summing a fixed offset from another

Procedure L3Craft E · Modular, Eurorack, grooveboxes & dawless

A voltage mirror reflects a signal about a chosen point: rising input produces falling output and vice-versa, centred on an offset. On Maths, patch the control signal to CH.2 Signal IN with its Attenuvertor full CCW (inverting it), leave CH.3 Signal IN empty and set CH.3 Attenuvertor full CW so it contributes a fixed positive offset, then take SUM OUT. SUM outputs (offset − input), the input reflected around the offset level. This differs from plain inversion, which mirrors around 0V; the CH.3 offset sets where the reflection axis sits. Useful for deriving a complementary modulation that moves opposite to a source.

Examples

Modulation CV → CH.2 Signal IN, Attenuvertor full CCW. Nothing in CH.3 Signal IN, CH.3 Attenuvertor full CW (offset). SUM OUT → second modulation destination — it now moves inversely to the source, around the offset point.

Assessment

How does a Maths voltage mirror differ from simply inverting a signal, and which control sets the axis the signal is reflected around?

Prerequisites — understand these first

Sources

“Apply Control Signal to be mirrored to CH. 2 Signal IN. Set CH. 2 Attenuvertor to Full CCW. With nothing inserted at CH. 3 Signal IN (so as to generate an offset), set CH. 3 Attenuvertor to full CW. Take output from SUM OUT.”
corpus · make-noise-maths-v2-illustrated-supplement-community-patch-m · chunk 2

Taught in modules