filter a place, echo from the other side, turn the room

Kuules Vortex is where the field gets moved on purpose. A filter that lives at a place and travels. Echoes that come back from the opposite side, mirrored, or turned. The whole room revolving. And modulation from the field itself: the louder, the more mirrored.

Everything on the map. The spotlight's real beam, where each echo returns from and when — farther out is later — with its repeats fading, the ring the room turns on, the mirror plane, the rim glowing with drive. Drag them, scroll them; the graphs move with the modulation.
A filter aimed at a direction. What it passes is filtered; the rest is not.
Opposite, left-right, front-back, up-down, or turned by an angle.
Two LFOs with eight shapes — one drawn by hand — free or synced, a follower, an envelope the field fires, and the four sides of the field. Each drawn live; each target shows its range and where it is now.