Change parameters to build an exact command. Your agent runs it with sb and gets the WAV.
Command
$ sb get C53M7THN3A@1 --preset brisk -o missed-call.wav
How it's made
Source
two soft felt-mallet taps on a small wooden resonator bar, played as a falling pair. The felt makes a 6–10 ms low-passed thump instead of a click, so the attack is soft.
Body
each note is a sine fundamental (260–560 Hz) with a stretched second partial (≈ 2.76×, as in a tuned wood bar) and a faint 5.4× partial; the upper partials die 2–4× faster than the fundamental and the whole spectrum is low-passed near 1.2–2.4 kHz, which gives the dark, muted colour.
Envelope
5–11 ms rise, then an exponential fall of 0.15–0.6 s (60 dB); the second note starts 0.12–0.32 s later, a minor third to a fifth lower and 20 % softer, so the cue reads as "fading away".
Variation
`rng` detunes each partial by ±0.2 % and the second tap's timing by ±4 ms; the interval, pitch, ring and warmth parameters set the mood of the presets.
Parameters
Parameter
Range
Default
Unit
Controls
pitch
260 – 560
392
Hz
Pitch
interval
minor-third · major-third · fourth · fifth
minor-third
—
Drop
spacing
0.12 – 0.32
0.2
s
Spacing
decay
0.15 – 0.6
0.34
s
Ring
warmth
0 – 1
0.4
—
Brightness
softness
0 – 1
0.6
—
Mallet softness
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.