Change parameters to build an exact command. Your agent runs it with sb and gets the WAV.
Command
$ sb get AXJ7QCV9D3@1 -o downlifter.wav
How it's made
Source
three layers. A pink-noise air bed, a pair of slightly detuned saw oscillators gliding down in pitch (the tonal "fall"), and a soft sub sine that follows the pitch an octave lower for weight.
Body
the noise passes a resonant low-pass whose cutoff falls exponentially from the bright start to a dark floor, a descending filter sweep. The saws pass a second low-pass that closes with the same curve, so the harmonics vanish as the pitch drops and nothing stays harsh.
Envelope
a soft 25 ms onset avoids a click, a short hold, then a long decrescendo (curved release) into silence; the sub fades slightly earlier than the noise so the tail is airy and dark.
Variation
length, start brightness, tonal amount, sweep depth and stereo width; `rng` shifts the saw detune and the noise stream slightly.
Parameters
Parameter
Range
Default
Unit
Controls
length
0.8 – 3.5
2
s
Length
brightness
0 – 1
0.55
—
Brightness
tone
0 – 1
0.5
—
Tonal fall
depth
0 – 1
0.6
—
How far the filter falls
width
0 – 1
0.6
—
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.