Cauldron Brew

How it's made

Source

a viscous potion simmering over a fire. Gas trapped under the thick surface escapes as large bubbles (5–16 mm, Minnaert 200–650 Hz) that ring briefly and burst; viscosity damps them and slows the rise.

Body

a low simmer bed, brown noise below ~220 Hz that breathes at ≈ 0.4 Hz, plus a soft pink band around 600 Hz for the churning liquid; each burst adds a short low-passed noise "blup" from the film breaking.

Events

bubbles arrive as a Poisson stream (1–9 per second) with occasional double bubbles; a rarer layer of small 1.5–3 mm bubbles adds fine blips, 0.8–2.2 kHz.

Magic

sparse twinkles, three detuned sine partials on a pentatonic set (1.6–6 kHz) with 0.4–1.1 s exponential decay and a faint shimmer tremolo, panned wide; the upper partials are weak so they stay glassy.

Variation

`rng` draws radius, level, pan, pitch choice and timing of every bubble and twinkle; presets change heat (rate and bed level), viscosity (bubble size and damping) and magic density.

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