Pendulum AC/DC Switch

[Nemesis]

For other people looking for this answer, I feel like it got a good response here:

A/C - D/C switches on Shapechanger and Navigator

James’ answer is good! To put it another way, turning AC mode on is removing any slow moving content from your modulation source. It’s a high pass filter with its cutoff at frame rate. With a positive DC biased signal (like 0-1V video) the signal is always additive. If you add it to a mix, the mix becomes brighter. If you subtract it from a mix, the mix becomes darker. You are modulating brightness. When you AC couple this signal, rising voltages will add, but falling voltages will subtrac…