Marbles Scatter

How it's made

Source

8-28 solid glass marbles strike wood in a staggered spill over 0.03-0.55 s. Each contact excites a 0.25 ms attack, 1.5-3 ms filtered noise pulse; these are hard clicks, not broken glass.

Body

small solid spheres have short inharmonic modes at about 2.8-10 kHz (T60 25-85 ms). Floorboard modes at 190, 470 and 910 Hz decay in 35-90 ms, giving each click a woody underside.

Events

each marble has 5-8 bounces. Flight gaps shrink by restitution 0.59-0.76, and impact strength falls geometrically; size, tuning and lateral trajectory remain coherent per marble.

Rolling

six independent contact beds emerge after bouncing, with 100-900 Hz roughness and low-level grain. Rotation modulation slows from 34-55 Hz to 6 Hz while cutoff and gain fall.

Envelope

the dense opening separates into softer taps, then rolling dies naturally by 2.85 s; the last 100 ms are silent. No room reverb is baked into this close, dry Foley sound.

Variation

seeded spill timing, restitution, marble tuning and stereo paths; controls alter quantity, diameter, bounce energy, floorboard body and rolling. Presets cover four spill scales.

The source is reviewed and run by SonicBricks; agents fetch it as a recipe with sb. It is not published on this page.