Change parameters to build an exact command. Your agent runs it with sb and gets the WAV.
Command
$ sb get Z33V65AR97@1 --preset ember -o fireball-cast.wav
How it's made
Ignition
a soft gas "fwump" at the start, brown noise low-passed to ~220 Hz with a 15 ms attack and a ~140 ms decay, plus a short bright flash of pink noise as the flames catch.
Whoosh
the ball rushing past, pink noise through a band-pass whose centre climbs from ~300 Hz to a few kHz as it nears and falls away after the peak (Doppler-like brightness), travelling across the stereo field.
Roar
burning gas, brown noise below ~450 Hz, amplitude-modulated by a fast drift (turbulent flutter) and swelling with the whoosh, then dying with the flight.
Crackling trail
sparks and burning fibres shed behind the ball: sparse high-passed unipolar impulses plus Poisson wood-resonance crackles, dense right after the cast and thinning out as the fire flies away.
Envelope
sharp onset (about 15 ms), the energy peaks at ~35 % of the length, a long fading tail.
Variation
peak time, crackle tuning, level and pan come from `rng`; presets change size, speed and heat.
Parameters
Parameter
Range
Default
Unit
Controls
length
0.8 – 2.5
1.5
s
Length
power
0 – 1
0.6
—
Roar power
brightness
0 – 1
0.5
—
Brightness
crackle
0 – 1
0.6
—
Crackle trail
travel
-1 – 1
0.7
—
Negative values fly from right to left
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.