I’m trying to get a grasp on the difference between modulating RGB colors and modulating “shapes” generated by Cortex ramps. I don’t really know if there actually is a difference, but some responses on the forum seem to indicate, for example, that certain CV techniques will modulate “brightness” and others “contrast.” Sometimes an LFO plugged into, say, the Ratio CV on the Shapechanger will do wacky color shifts, and other times it will skew/contort a shape. I should be recreating a patch here for your consideration, and forgive me for being lazy about that, but I’m wondering whether we can generally discuss why the results might vary.
Well it all starts with knowing that everything is a voltage control input in the system.
More voltage into oscillator frequency control = higher frequency on modulated oscillator
More voltage into color encoder’s red channel = brighter red on your TV
More voltage into an A to B crossfader CV (like Bridge, etc) = more of B and less of A mixed to the output
Really fast voltage = camera image showing a dense pattern
Really slow voltage = a low frequency oscillator doing a sine wave sweep for swaying motion
Audio signal (medium frequency voltage) = horizontal displacement across the image
Voltage is a universal language, especially in the LZX system where low frequencies and camera images share the same patch points and signal spaces.
Once you get your head wrapped around this, it’s quite easy to understand that every signal in your system is just fluctuating voltage levels across time. What makes the patch isn’t the content of the signals themselves; it’s what they’re patched into.