Typing Indicator Loop

How it's made

Source

a fingertip tapping a padded surface three times. Each contact is a 3–6 ms low-passed noise puff (soft pad, little energy above 3 kHz) that excites a rounded tonal body.

Body

a small wooden/plastic cap rings in one damped mode (700–1500 Hz, 25–60 ms) with a second, weaker mode at ≈ 2.3x; a faint sine "thump" at half the pitch gives each tick weight without sub-bass.

Envelope

attack under 1 ms, 60 dB decay in 40–90 ms; three taps 0.16–0.34 s apart, each slightly higher and softer than the last like a living rhythm, then a silent pause fills the rest of the 3 s cycle.

Rhythm

the 3 s loop holds exactly one cycle (taps, then a pause of about 2 s), so the loop point falls in silence and repeats without a seam; longer renders repeat the cycle.

Variation

`rng` mistunes each tap by ±2 % and varies its level by ±10 %, so taps are not mechanical.

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