Suspense Bed

How it's made

Source

a low orchestral-style drone bed. Two detuned sub oscillators (≈ 41 Hz sine, ≈ 82 Hz triangle) beat against each other at 0.1–0.4 Hz; a pair of slightly detuned saws a fifth and a minor second above add a dark, unresolved colour. Air and room rumble come from brown and pink noise, decorrelated left and right.

Body

the saws and the noise pass through low-pass filters whose cutoffs wander slowly (random drift, ≈ 150–700 Hz centre, 20–40 s periods), so the spectrum opens and closes like a slow filter sweep.

Events

sparse metallic swells, one every 6–12 s. Each is a struck-then-bowed metal plate modelled as inharmonic partials (1 : 2.76 : 5.4 : 8.93, bar-like) with a 1.5–3 s rise and a 3–5 s fade, the upper partials arriving later and dying sooner. They sit between 180 and 420 Hz and pan across the stage.

Envelope

no attacks; the bed fades in and out with the texture fades, the drone breathes with a ≈ 12 s level swell, and swells bloom slowly so nothing reads as a hit.

Variation

`rng` picks swell pitch, timing, pan and partial detune; macros set darkness (cutoff range), tension (minor-second beating and saw level), swell density and stereo width.

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