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Glitch effect

Slit-Scan Delay

Slit-Scan Delay is a glitch video effect in FRCTL, the browser VJ studio. Rows drift sideways on noise while a ripple of bands rolls through, like a scan losing its line. Works on stills; for real time slices use Time Machine.

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.

Try Slit-Scan Delay free All effects

The untouched demo art: an eye inside a triangle over wavy teal, blue and peach lines — Source

The eye-in-triangle rippled into wavy horizontal bands with red and cyan fringes along each line — Slit-Scan Delay, default settings

What Slit-Scan Delay does

Slides each row sideways by a noise amount that drifts over time, while a sine ripple of bands travels through and bobs the picture up and down. Red and blue then split horizontally. Tear sets the sideways drift, Wobble the ripple, Slits the band count (hard left removes the bands), and Axis turns everything to Columns. Every sample comes from the current frame, so it moves on a still too.

Using Slit-Scan Delay

Where it works: Stills and logos that should wobble like a badly scanned signal, and slow intro loops where the drifting rows keep the frame alive without any cuts.
With the music: B2 (sub bass) on Wobble swells the ripple with the low end, and B7 (snare) on Tear throws the rows sideways on each snare. The drift underneath runs at the Speed setting.
Starting point: Slits at centre, Tear at a quarter, Chroma at a quarter, Wobble at three-quarters, Axis on Rows, Speed at a quarter.

Controls

Slits: Band frequency along Y.
Tear: How far each row drifts sideways.
Chroma: RGB channel separation after the slit shift.
Wobble: Sideways ripple on the bands, split out of Tear so the drift and the wobble can disagree.
Axis: Which way the slits run.
Speed: Rate of the effect motion. Centre is the authored speed, hard left a tenth of it.

Pairs well with Slit-Scan Delay