Maths OR output performs half-wave rectification by passing only positive portions of a bipolar signal

The OR (maximum) bus in Maths outputs the highest voltage across all channels connected to it. When a bipolar signal is applied to one channel and others contribute 0V, the OR bus only passes the positive portion — the negative swing is clamped at 0V because OR takes the maximum. This is half-wave rectification: negative cycles are suppressed. Unused channels must be at neutral (noon attenuvertor) to avoid adding offsets.

Examples

Bipolar LFO → CH.1 Signal IN. CH.2, 3, 4 Attenuvertors at noon (0V). Take OR OUT. Only positive LFO swings appear at the output.

Assessment

Explain why OR OUT produces half-wave rectification, and what setting on CH.2/3 would inadvertently add a DC offset to the rectified signal.