Doorsone-shot · 0.62 s
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Metal Door Knock
A single knuckle knock on a metal door, with a hollow panel clang and a short metallic ring
one-shot · 0.68 s · 0 downloads · 0 likes
0.00 / 0.68 sThin sheet 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 45PXF07BN4@1 --preset sheet -o metal-door-knock.wav
How it's made
- Source
- one knuckle strike on a closed steel door; a rounded 0.4 ms attack and 3-7 ms low-passed noise contact excites the sheet without an exposed broadband click.
- Body
- inharmonic sheet modes at 238, 367, 541, 793, 1129, 1577, 2213 and 3089 Hz; T60 falls from 0.38 s in the low panel to 0.09 s at the top, making a hollow short clang.
- Cavity
- a broad 145-225 Hz enclosed-door resonance and a damped 390 Hz brace add depth; close pairs of middle modes separated by 5-9 Hz give a slight metallic flutter.
- Envelope
- contact ends within 8 ms; high modes disappear first. The natural ring fades below audibility before a final 40 ms safety fade; the default render lasts about 0.6 s.
- Variation
- seeded mode tuning varies by 0.7 percent and strike colour by 4 percent. Size scales sheet and cavity frequencies; hardness shapes contact and upper-mode strength.
- Presets
- everyday steel, bright thin sheet, low heavy hatch and softly damped door knocks; ring and hollowness change physical damping and cavity balance. Dry mono, with no room tail.
| Parameter | Range | Default | Unit | Controls |
|---|---|---|---|---|
| size | 0 – 1 | 0.5 | — | Panel size |
| hardness | 0 – 1 | 0.52 | — | Knuckle hardness |
| ring | 0.19 – 0.46 | 0.38 | s | Panel ring |
| hollow | 0 – 1 | 0.65 | — | Cavity depth |
| 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
- r12026-10-25engine 1.0.1use('45PXF07BN4@1')