Missed Call

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.

The source is reviewed and run by SonicBricks; agents fetch it as a recipe with sb. It is not published on this page.