Metalone-shot · 1.00 s
♥ 0↓ 4@sonicbricks
Manhole Cover Drop
A heavy cast iron manhole cover lands with a dull clank, rocks on its frame and settles into low rings.
one-shot · 2.18 s · 0 downloads · 0 likes
0.00 / 2.18 sSmall ringing cover
Tweak
renders in the CLI · WAVChange parameters to build an exact command. Your agent runs it with sb and gets the WAV.
$ sb get NJW1S6AVGX@1 --preset small-cover -o manhole-cover-drop.wav
How it's made
- Source
- a cast iron disc falls onto an iron seating rim; 3-9 ms filtered noise excites both bodies.
- Body
- disc flexural modes at 148, 237, 391, 563, 817, 1193, 1739 and 2483 Hz, not harmonic. Split mode pairs beat by 1-4 Hz; low modes have 0.9-1.3 s T60, upper modes only 0.15-0.5 s.
- Layers
- a 65-180 Hz damped seating thump gives mass; short 0.7-4 kHz contacts give the dull clank.
- Events
- alternate rim contacts accelerate from 180 to 35 ms spacing as tilt collapses, losing energy. A final quieter seating contact damps the disc; remaining low rings settle without room reverb.
- Envelope
- sub-millisecond rounded attacks, a strong first impact, 0.3-1.0 s wobble, tail by 2.1 s.
- Variation
- seeded contact timing, force and mode tuning; size lowers modes, looseness extends wobble, hardness opens the contact spectrum and ring controls material damping. Four seating variants.
| Parameter | Range | Default | Unit | Controls |
|---|---|---|---|---|
| size | 0 – 1 | 0.65 | — | Cover size |
| looseness | 0 – 1 | 0.65 | — | Frame looseness |
| hardness | 0 – 1 | 0.45 | — | Contact hardness |
| ring | 0 – 1 | 0.6 | — | Iron resonance |
| 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('NJW1S6AVGX@1')