MATHS OR, SUM, and INV are analog logic outputs that combine signals from all channels

The MATHS logic section provides three outputs derived from its four channels. OR passes whichever input has the highest voltage (analog maximum function — not Boolean OR, though it behaves like OR for gate signals). SUM adds all channels arithmetically. INV inverts the summed signal. These are analog logic operations: they inspect and combine voltages without thresholding to digital on/off. For gate and trigger signals, OR acts like a true Boolean OR (either signal high = output high). For audio-rate or LFO signals, OR and SUM are mixing and waveshaping tools respectively. Because SUM mixes all channels, these outputs also let MATHS act as a CV mixer without a separate module.

Examples

Two drum triggers → OR output: a merged trigger fires whenever either drum would. Two LFOs → SUM: combined waveshape, useful for pseudo-random motion. Slow LFO + fast envelope → SUM → filter cutoff: both modulations added.

Assessment

Explain why OR is described as an analog logic operation rather than true Boolean logic. Give one patch where OR behaves exactly like Boolean OR and one where it does not.