Platformer Jump

How it's made

Source

a cartoon jump is a "boing" built from a pitched voice, not a physical impact. A triangle and a sine (level ratio 1 : 0.35) share one rising pitch glide, like a slide-whistle or spring toy.

Body

the glide runs from ≈ 330 Hz up by an octave (ratio 2) on a convex curve, fast at first and then settling; a soft low-pass follows the pitch (1.6–4 × f) so upper harmonics open as the sound rises. A 14 Hz vibrato of 0.4–3.4 % depth fades in over the glide and gives the springy wobble.

Layers

a sine "push-off" thump (45 ms, falling 160 → 90 Hz) marks the leg push; a faint band-passed air breath (1.5 → 4 kHz, 90 ms) suggests the whoosh of the body leaving the ground.

Envelope

3 ms onset ramp (no click), peak at ≈ 40 ms, exponential fall to silence by ≈ 0.3 s; the pitch glide ends before the level has fallen, so the tail is a short settled tone.

Variation

`rng` shifts the base pitch ±2 % and the vibrato phase; `pitch` sets the character's size, `rise` the glide span, `bounce` the wobble depth, `air` the breath level; presets change all of them.

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