Checkpoint Reached

How it's made

Source

a small tuned bell or glockenspiel bar struck twice with a soft mallet; each strike is a 1–3 ms low-passed noise tick that excites the bell body, the second strike a fourth or fifth above the first.

Body

each note is a bank of bell partials relative to its pitch: hum 0.5, prime 1, a near-octave 2.01, a bright tierce-free upper set at 2.76, 4.07 and 5.4. Each partial is a pair of sines a fraction of a hertz apart, which makes the tail shimmer gently. Upper partials die 3–8 times faster than the prime, so the attack is bright and the tail is a pure, reassuring tone.

Envelope

1.5 ms soft attack, then exponential decays (prime T60 0.4–1.2 s); the second note starts 0.12–0.3 s later, rings longer and louder (resolution), and overlaps the first note's tail.

Variation

`rng` mistunes every partial by ±0.2 % and varies the strike tick; `brightness` scales the upper partials and the mallet hardness, `interval` and `spacing` set the rising figure, `decay` the ring time.

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