Change parameters to build an exact command. Your agent runs it with sb and gets the WAV.
Command
$ sb get 24CY9V75M5@1 --preset old -o empty-cathedral.wav
How it's made
Source
a large stone nave at rest. The room tone is air in motion: pink noise, decorrelated left and right, low-passed around 300-900 Hz and drifting slowly; a brown-noise rumble (25-80 Hz) is the building's low hum.
Body
stone surfaces ring in sparse, inharmonic modes with 4-9 s decay (modalPreset 'stone', large size); a thin 1.5-3.5 kHz air band gives the faint high shimmer of a 6-10 s reverberant field.
Events
distant knocks (a pew shifting, a far door) are soft low-passed bursts at 0.04-0.08 /s, each followed by a smeared noise tail that decays over 5-8 s; faint creaks (timber and iron) are slow band-passed noise swells with a gliding resonance around 300-900 Hz, one every 15-30 s on average.
Envelope
nothing is loud; the bed breathes with two slow drifts (periods ~10-25 s) and every event arrives from far away: attacks of 5-30 ms, then long decays.
Variation
`rng` sets timing, pan, pitch and strength of every knock and creak; presets move the balance between air, rumble, knocks, creaks and size.
Parameters
Parameter
Range
Default
Unit
Controls
size
0 – 1
0.6
—
Size
air
0 – 1
0.5
—
Air
rumble
0 – 1
0.45
—
Rumble
knocks
0 – 1
0.4
—
Distant knocks
creaks
0 – 1
0.4
—
Creaks
spread
0 – 1
0.8
—
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.