Chromatic Sorting is a glitch video effect in FRCTL, the browser VJ studio. Pseudo-sorts red horizontally and blue vertically from brightness gates.
Runs live on video, images, a camera or generated art. Stack it with any other effect, and route LFOs, envelopes or any of ten audio bands to its controls so it moves with the music.
Pushes red along the chosen heading and blue at right angles to it, each gated by brightness: red moves out of the highlights, blue out of the shadows, and green drifts slightly. Thin hash bands vary each gate, so red and blue land as crossed stripes and the art goes teal-green with magenta and blue ghosts. Shift sets the distance, Bands the stripe count.
Using Chromatic Sorting
Where it works
Colour-separation looks on stills and logo plates, where two channels crossing at right angles give a woven, misregistered finish that Pixel Sort's single axis can't. No clock, so it renders one fixed frame for an export.
With the music
A BPM-synced LFO on Shift sweeps the channels out and back each bar, and B1 (kick) on Bands reshuffles the stripes on every kick.
Starting point
Bands at centre, Shift at a quarter, Blend at three-quarters, Direction on Right.
Controls
Bands
Row/column hash band frequency.
Shift
Horizontal/vertical channel shift strength.
Blend
Blend strength toward the sorted sample.
Direction
Which way red sorts. Blue always takes the perpendicular.