Change parameters to build an exact command. Your agent runs it with sb and gets the WAV.
Command
$ sb get 3RPJZ9NMPE@1 --preset breath -o invisibility-fade.wav
How it's made
Source
three layers. (1) An airy breath of pink noise that carries the "vanish". (2) A cloud of detuned high sine partials that shimmers like dissolving glitter. (3) A soft, low sine-pair body that gives the spell a moment of weight before it thins out.
Body
the noise passes a band-pass whose centre falls from bright to dark (descending filter); the shimmer partials glide downward and each has its own slow tremolo, so the cloud breaks up into separate sparkles; the body sighs down by up to a fifth.
Envelope
a soft 40 ms swell avoids any click, the layers peak early and dissolve along different curves (shimmer fastest, air slowest) so the end is just a faint breath; a final fade reaches zero.
Variation
length, brightness, shimmer amount, airiness and the glide depth; rng detunes the partials and shifts tremolo phases and rates.
Parameters
Parameter
Range
Default
Unit
Controls
length
0.8 – 3
1.5
s
Length
brightness
0 – 1
0.55
—
Brightness
shimmer
0 – 1
0.6
—
Shimmer
air
0 – 1
0.6
—
Air
body
0 – 1
0.4
—
Body
glide
0 – 1
0.5
—
How far the pitch and filter fall
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.