Air Blast Spell

How it's made

Source

a burst of air forced outward. Turbulence is pink noise; the pressure front is a short low sine thump that falls from about 150 Hz to 45 Hz in 0.2 s. The magic adds a swirl of detuned sines.

Body

the rush is band-passed (Q ≈ 0.9) with a centre that leaps from 300 Hz to the peak (1.5-5 kHz) within 0.15 s and then falls back; a narrow resonator on the same curve gives the airy tonal swirl, whose pitch is wobbled by a 5-7 Hz sinusoid so it seems to spin.

Envelope

pressure-first attack (about 12 ms for the thump, 40 ms for the rush), a fast exponential release so the gust is mostly gone by 0.9 s; the swirl lags the rush by 60 ms and fades last.

Layers

thump (pressure), rush (turbulence), swirl (two detuned glassy sines at 1:2 plus resonated air), sparkle (highpassed noise at 6 kHz+ with a short tail). Left and right use separate noise sources.

Variation

`rng` shifts swirl tuning by ±3 % and the peak time by a few percent; `power` sets pressure and brightness, `swirl` the tonal amount, `length` the release, `sparkle` the shimmer.

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