Boulder Impact

How it's made

Source

one boulder arrests against rocky ground; a 3 ms rising contact burst lasts 35–70 ms.

Body

irregular stone modes at 95–1200 Hz decay in 70–360 ms; a broad 40–160 Hz ground impulse supplies mass without a pitched bass drop. Larger rocks lower and lengthen the modes.

Layers

compressed gravel makes a 700–5500 Hz crackling burst; 22 scattered chips land over 0.03–1.5 s, with short damped modes and falling strength rather than repeated large impacts.

Envelope

immediate main strike, grit peaks 25 ms later, low rumble opens in 18 ms and darkens from 240 to 75 Hz over 1.7 s. All layers fade naturally before the 2.5 s safety boundary.

Variation

seeded mode detuning, chip times, size and pan; mass sets body scale, hardness sets contact brightness, grit sets fragment activity, and settling sets the rumble decay.

Presets

bedrock is compact and hard, scree scatters chips, monolith is deep and slow, and weathered rock has a softer contact with a dense, short gravel crush. No room reverb is added.

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