Change parameters to build an exact command. Your agent runs it with sb and gets the WAV.
Command
$ sb get PPCFRRTCJ7@1 --preset heavy-shell -o beetle-takeoff.wav
How it's made
Source
two hard wing cases unlatch at 4 and 58 ms, followed by a softer hinge tick near 125 ms. Filtered 1-3 ms noise excites dry shell modes at 1.2, 2.3 and 4.1 kHz; no room is baked in.
Body
wing loading produces a 65-145 Hz buzz with six phase-related, falling-strength harmonics. Low-rate frequency wander and unequal stroke lobes roughen the buzz without a harsh saw edge.
Layers
stroke-modulated air noise spans 220 Hz to 3.6 kHz, with a broad 650 Hz body band. A short papery unfolding rustle bridges the shell clicks and the first powered strokes.
Envelope
wing motion starts 110-270 ms after unlatching and accelerates over about 180 ms. Lift peaks around 400 ms, then amplitude and high-frequency content recede to silence by 1.4 s.
Variation
seed changes shell timing, modal tuning and independent air turbulence; size changes shell pitch and wing rate. Presets cover light darting, heavy lumbering, hesitant and brisk takeoff.
Parameters
Parameter
Range
Default
Unit
Controls
size
0 – 1
0.6
—
Body size
roughness
0 – 1
0.6
—
Wing roughness
launch
0.11 – 0.27
0.17
s
Launch delay
flight
1.13 – 1.5
1.4
s
Flight tail
shell
0 – 1
0.65
—
Shell presence
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.