Shadowgraph of sound
Schlieren
See Karel's recording as the air it moves — a synthetic knife-edge schlieren image of his music, rendered as luminous plumes of disturbed density billowing from unseen sources.
Loads one of Karel's real recordings and renders the air it moves as a shadowgraph of sound.
A field of simulated air, forced by the low, mid and high energy of his playing, rendered as a classic monochrome knife-edge schlieren image.
Every plume and ripple is forced by this take — his own sound made visible as air.
A real schlieren control: the knife reveals density gradients along one axis and hides those perpendicular to it.