Skip to content

Pulse & motion effect

Subquake Jolt

Subquake Jolt is a beat-reactive motion effect in FRCTL, the browser VJ studio. Per-frame translation jitter, roll whiplash, and motion blur on peaks. Map jitter to B2/B3; roll and blur to B1.

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 Subquake Jolt free All effects

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

The eye-in-triangle art doubled into offset ghost copies, slightly rotated, as if the camera shook — Subquake Jolt, default settings

What Subquake Jolt does

Shakes the whole frame to a new random offset 48 times a second, adds a small random roll, and blurs each position along the shake so the picture ghosts into two or three copies. The shake runs on its own clock at any setting and grows with intensity. Jitter sets the shake, Roll the twist, Blur the ghost spread, and the last two only bite at high intensity.

Using Subquake Jolt

Where it works: A camera earthquake for the heaviest drop in the set, or a few seconds on a Reel before the beat returns. It shakes the camera itself, where the rest of the family bends or slices the picture.
With the music: It shakes without help, so routing decides how hard. B2 (sub bass) on Jitter widens the shake through a sub drop, and B1 (kick) on Roll and Blur whips and smears the frame on each kick.
Starting point: Jitter a quarter, Roll three-quarters, Blur centre, then route B1 to Roll for a whiplash on the kick.

Controls

Jitter: Translation shake scaled by intensity.
Roll: Roll whiplash weighted by pow(intensity).
Blur: Directional blur tap spread on peaks.
Speed: Rate of the effect motion. Centre is the authored speed, hard left a tenth of it.

Pairs well with Subquake Jolt