Ambiencetexture · 15 s
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Underground Parking Garage
A concrete underground car park with a ventilation hum, distant echoing doors and the odd tyre squeak
texture · 15 s · 0 downloads · 0 likes
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Tweak
renders in the CLI · WAVChange parameters to build an exact command. Your agent runs it with sb and gets the WAV.
$ sb get 72B3MCMEB7@1 -o underground-parking-garage.wav
How it's made
- Source
- a ventilation fan and ducting. Turbulent air is brown/pink noise band-limited to 35–900 Hz; the motor adds a mains hum (100 Hz plus 2nd/3rd harmonics) and the blades a slow ~7 Hz flutter.
- Body
- the concrete hall is a large hard cavity: the hum sits in a broad ~115 Hz room mode, and every discrete event is sent through a long cave-style reverb (2–5 s) that smears it into a diffuse wash.
- Events
- distant steel doors slam as a low-passed thud (120–220 Hz) plus a damped metal-bar ring, far away (air absorption above ~2 kHz); tyres squeal as a 1.6–2.6 kHz sawtooth with a gliding pitch, a ~25 Hz stick-slip amplitude flutter and a band-pass body, both reverberated.
- Envelope
- the fan drone breathes slowly (drift of about ±1.5 dB); slams decay in ~0.2 s before the reverb tail takes over; squeaks last 0.3–0.8 s with a soft attack and release.
- Variation
- `rng` draws event times, strength, pitch, size of each door and the stereo position.
| Parameter | Range | Default | Unit | Controls |
|---|---|---|---|---|
| hum | 0 – 1 | 0.5 | — | Ventilation |
| doors | 0 – 1 | 0.4 | — | Distant doors |
| squeaks | 0 – 1 | 0.35 | — | Tyre squeaks |
| reverb | 0 – 1 | 0.6 | — | Concrete reverb |
| darkness | 0 – 1 | 0.5 | — | Darkness |
| spread | 0 – 1 | 0.7 | — | Width |
| 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('72B3MCMEB7@1')