Acorns

How it's made

Source

each acorn is a small, hard, light shell. Every contact is a very short click (sub-ms impact) that rings the shell's own modes (2–5 kHz, heavily damped, a few ms).

Resonance

the surface decides the colour. A wooden tray adds a fixed set of plate modes (200 Hz–1.5 kHz, 0.05–0.15 s) that every hit shares; muddy ground swallows the impact into a dull, short, low thud with a little grit, and damps the shell click.

Events

physics, scheduled at build time. Each acorn is released at its own moment (one by one, or all at once for a handful), lands with speed √(2gh), then bounces with restitution e (high on wood, tiny on mud): every bounce is quieter and the gaps shrink geometrically (2v/g). Irregular shapes randomize e. When the bounces die out the acorn rocks (a few faint, accelerating taps) and rolls (a short crackly rumble through the tray). In a handful, acorns also knock into one another (shell-on-shell clicks without the floor).

Layers

floor hits (shell + tray / thud), nut-on-nut clicks, rolls; each acorn panned on its own.

Parameters

count, hardness (mud → wooden tray), spread (handful → one by one), height, size, roll.

Presets

朝三 (three, one by one), 朝四 (four, a little denser and quicker), 一捧 (a handful poured).

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