Change parameters to build an exact command. Your agent runs it with sb and gets the WAV.
Command
$ sb get 42SA3K51TP@1 -o stone-spike-spell.wav
How it's made
Source
rock slab splitting under pressure. A low rumble (brown noise, 40–180 Hz, plus a 38→55 Hz sub swell) builds for ~0.3 s while the ground heaves; each spike is a short noise burst of fracturing grains.
Body
grinding crack = band-passed noise (500–3500 Hz) chopped by a random stick-slip gate, its centre rising as the fracture opens; every spike excites a dense, short-ringing stone mode bank (size sets pitch) plus a 130→50 Hz thump from the displaced mass.
Envelope
rumble swells 0.3 s, spikes erupt 0.22–0.75 s in a rapid staggered burst, then everything is cut in a few tens of ms when the spikes lock in place (the "sharp stop").
Variation
`rng` jitters spike timing, strength, mode tuning and the grain gate; presets change spike count, rock size, grind and rumble weight.
Parameters
Parameter
Range
Default
Unit
Controls
spikes
2 – 9
5
—
Spikes
size
0 – 1
0.5
—
Rock size
rumble
0 – 1
0.6
—
Rumble
grind
0 – 1
0.55
—
Grinding
crack
0 – 1
0.6
—
Crack
stop
0.01 – 0.08
0.025
s
Stop time
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.