Windtexture · 15 s
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Flag Flapping
Close fabric flutter and sharp tension snaps as a flag lashes against strong, uneven gusts.
loop · 8.00 s · 0 downloads · 0 likes
0.00 / 8.00 sdefault
Tweak
renders in the CLI · WAVChange parameters to build an exact command. Your agent runs it with sb and gets the WAV.
$ sb get XVRJ4T7DX5@1 -o flag-flapping.wav
How it's made
- Source
- a flag repeatedly folds and pulls taut on its pole. Filtered noise models fabric friction, with 1 ms attacks and 9–22 ms releases for tension snaps, not electrical impulses.
- Body
- broad, damped cloth bands at 160–900 Hz make the rounded flap; 0.7–7 kHz folds give close detail. Larger, heavier cloth lowers these bands and lengthens each 55–170 ms billowing envelope.
- Envelope
- two unequal gust lobes per 8 s cycle accelerate irregular flaps from about 4 to 13 per second. Gust pressure coherently increases wind brightness, flap strength and the proportion of sharp snaps.
- Layers
- each fold has a low fabric slap, a falling spectral friction band and a delayed recoil; restrained stereo air occupies 100–2400 Hz beneath the close, narrowly positioned fabric.
- Variation
- seeded timing, strength, band centres, recoil delay and pan avoid mechanical repetition. Four presets contrast taut nylon, heavy canvas, a storm banner and a small flag in separated gusts.
- Space
- dry close perspective, no tonal pole whistle or reverberation; the engine crossfades the seam.
| Parameter | Range | Default | Unit | Controls |
|---|---|---|---|---|
| speed | 4 – 13 | 8 | — | Flutter rate |
| size | 0.6 – 1.6 | 1 | — | Fabric weight and size |
| snap | 0 – 1 | 0.7 | — | Tension snaps |
| gustiness | 0 – 1 | 0.7 | — | Gust contrast |
| air | 0 – 1 | 0.3 | — | Air rush |
| 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('XVRJ4T7DX5@1')