Levitation Spell

How it's made

Source

an enchanted object held aloft. No physical contact, so the sound is a soft sustained hum: a stack of slightly detuned sine and triangle voices (fundamental 70-200 Hz) with weak 2nd-3rd harmonics, plus a breath of band-passed pink noise as the displaced air under the object.

Body

the hum is low-passed (600-2400 Hz) so it stays rounded; a wide band-pass around 700-1100 Hz gives the air layer its hollow, airy colour. Left and right voices are detuned by ~0.3 % for width.

Modulation

a slow vibrato (about 0.8 Hz, +-0.3-1.4 %) on the whole hum, a slower swell breathing in the level and air filter (2 periods per loop) and a random pitch drift. The vibrato and swell rates are whole periods of the 6 s loop, so the seam stays smooth.

Shimmer

six high sine partials (inharmonic ratios, roughly 1-6 kHz) fade in and out on independent slow envelopes, 20-40 dB below the hum, like faint glints of magic dust.

Variation

`rng` offsets the tuning of every voice and the phase of every shimmer; presets move the pitch, vibrato depth, air and shimmer to give a feather, a heavy stone, a crystal and a ghostly hover.

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