Impactsone-shot · 0.28 s
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Wood Knock
Knuckles knocking on a wooden door: a short hollow knock-knock-knock with damped low-mid modes
one-shot · 0.52 s · 0 downloads · 0 likes
0.00 / 0.52 sSolid oak door
Tweak
renders in the CLI · WAVChange parameters to build an exact command. Your agent runs it with sb and gets the WAV.
$ sb get 8WQ71A5GRF@1 --preset solid-door -o wood-knock.wav
How it's made
- Source
- knuckles rapping a wooden door. The flesh-and-bone contact is a soft 2–6 ms low-passed noise burst (1–3 kHz corner) plus a short 70–110 Hz thump from the finger mass; a harder rap is brighter and shorter.
- Body
- a panel door rings in a few heavily damped inharmonic modes (≈ 1 : 1.9 : 2.8 : 4.1 : 5.7, T60 40–140 ms) near 170–330 Hz; a hollow-core door adds an air-cavity resonance (110–230 Hz, Q 5–12) that gives the low-mid "boom"; a 1.2–2 kHz band adds the frame and surface click.
- Envelope
- each rap peaks within 1 ms and the body is 20 dB down after about 60 ms; the knock-knock-knock slows slightly and each rap is a little softer, finishing near 0.4 s with a short fade for a clean tail.
- Variation
- `rng` jitters timing (±6 %), strength and mode tuning (±2 %) of every rap; `size` scales the mode and cavity frequencies, `hollow` the cavity level, `damping` the T60 of the modes.
| Parameter | Range | Default | Unit | Controls |
|---|---|---|---|---|
| knocks | 1 – 4 | 3 | — | Knocks |
| spacing | 0.08 – 0.2 | 0.1 | s | Spacing |
| size | 0 – 1 | 0.5 | — | Door size |
| hardness | 0 – 1 | 0.45 | — | Hardness |
| hollow | 0 – 1 | 0.6 | — | Hollowness |
| damping | 0 – 1 | 0.5 | — | Damping |
| seed | int | 1 | — | Variation, reproducible |
The source is reviewed and run by SonicBricks; agents fetch it as a recipe with sb. It is not published on this page.
Revision history1
- r12026-10-24engine 1.0.1use('8WQ71A5GRF@1')