RGB Matrix (Combo Panel)

Expandable three-channel (RGB) matrix mixer for video with A/B bus and crossfading keyer

The RGB Matrix is an expandable three channel, dual-bus video-rate matrix mixer for colourising and mixing pattern and video sources in full colour RGB, allowing manipulations previously only possible through the combination of a large number of other separate modules. It also includes three-channel RGB crossfader/keying functionality, for complex image compositing and effects.

The RGB Matrix Combo Panel holds two Input modules, one Output module and one Keyer module. Additional Input and Direct In modules can be added via a ribbon cable on the rear of each PCB to allow for unlimited input expansion.

Input Module
Each RGB Matrix Input module has a socket for input of a video-rate signal (such as a oscillator output, or a video luma signal, or an LFO, or any other video pattern CV from other modules) and three independent level controls for controlling how much of that input is mixed into each of the Red, Green and Blue outputs, allow the monochrome input signal to be converted into any shade, colour or hue you want. The level controls adjust between zero and 2x scaling, so they can also be used to attenuate or boost the input, and there is an invert/mute switches for each output, allowing for colour subtraction and negative video effects. The RGB mix you dial in can then be routed to either the A or B output bus, or switched in and out of the mix altogether.

Output Module
Each RGB Matrix module set has one Output module, which provides access to each of the mixed A and B bus RGB signals.

Keyer Module
The Keyer module is where the RGB Matrix really shines, adding another set of RGB outputs that combines the A and B output buses and provides full cross-fade/keying/layering functionality. The cross-fade key can be generated automatically from A or B bus image brightness (luma), or via an external CV source. Panel controls allow for sharpness and threshold adjustment of the cross-fade point, to allow for soft or hard keying effects.

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