Change parameters to build an exact command. Your agent runs it with sb and gets the WAV.
Command
$ sb get W4PBTNVHB3@1 --preset short-scoot -o wooden-chair-scrape.wav
How it's made
Source
wooden feet stick and slip across a hard floor; filtered noise forms a continuous dry rasp. Two offset leg trains release at 18-38 Hz, with 2-5 ms attacks and 15-40 ms friction releases.
Body
each slip excites damped wooden frame modes near 230, 590, 980 and 1510 Hz, T60 35-90 ms. Broad moving friction bands at 500-1800 Hz keep the scrape mid-heavy rather than metallic or hissy.
Envelope
load rises over 25 ms, drags for 0.5-1.0 s, then slows into separated softer chatter. A 70 ms friction release and a final 50 ms safety fade leave no chopped ringing or clicks.
Layers
a quiet continuous rubbing bed bridges the leg chatter; no room reverb is baked in.
Variation
named random streams vary leg timing, contact strength, grain and frame tuning by 4%. Travel sets duration; grip sets stick-slip contrast; hardness sets grain; mass lowers frame modes.
Presets
short scoot, heavy judder, smooth slide and tile chatter vary timing, body and friction balance.
Parameters
Parameter
Range
Default
Unit
Controls
travel
0.5 – 1.05
0.82
s
Drag duration
grip
0 – 1
0.72
—
Stick-slip grip
hardness
0 – 1
0.55
—
Floor hardness
mass
0 – 1
0.55
—
Chair mass
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.