Alien Ship Drone

How it's made

Source

the hull-borne hum of a large hovering craft, modelled as banks of slightly detuned sawtooth oscillators on a low fundamental (≈ 37 Hz) plus pure sub sines an octave below; a faint pink-noise air bed stands for displaced air under the hull.

Body

the hull is a dark, heavy resonator. The saws pass a low-pass whose cutoff swells from ~200 Hz to ~800 Hz with a gentle Q; two soft inharmonic partials (ratios 6 and 11.04 of the fundamental) ring quietly as a metallic overtone that only opens at the top of the swell.

Beating

left and right voices are detuned by a few tenths of a Hz to ~2 Hz, so the stereo layers beat against each other and the sum pulses slowly, like a rotating field.

Envelope

a 0.1 Hz swell (one full cycle per 10 s loop) raises level and brightness together, so the craft seems to bear down and recede; a 1.2–3.2 Hz throb of up to 28 % depth rides on the body and sub.

Variation

`rng` offsets oscillator phases and drives a slow pitch drift (±0.4 %); presets change fundamental, throb, detune, swell depth and metallic content.

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