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Feedback Rack applied to FRCTL's test image: A rack of feedback types. Every slider is a different kind of feedback and zero switches it off, so they stack: swell with spin is a spiral, rise with melt is smoke.

Tunnels effect

Feedback Rack

A rack of feedback types. Every slider is a different kind of feedback and zero switches it off, so they stack: swell with spin is a spiral, rise with melt is smoke.

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 Feedback Rack freeAll effects

Controls

Echo
Plain trails. The last frame straight back in, so anything that moves leaves a ghost behind it.
Swell
Each pass grows out of the centre, so the picture streams towards you like a tunnel run in reverse.
Spin
Each pass turns about the centre. On its own it is a vortex; with swell it becomes a spiral.
Rise
Each pass lifts and sways, so bright edges climb the frame like smoke.
Melt
Each pass is pushed through a slow flow field, so trails pool and ooze instead of travelling in straight lines.
Mirror
Each pass is folded six ways round the centre, so trails come back as a kaleidoscope.
Prism
Each pass splits red outward and blue inward, so trails fan into rainbow rings.
Speed
Rate of the effect motion. Centre is the authored speed, hard left a tenth of it.