Wildfire Front

How it's made

Source

a wind-driven flame front entrains air through dry brush. Independent pink turbulence beds cover 45-900 Hz; brown pressure below 260 Hz supplies weight without a tonal oscillator.

Body

gusts lift the roar cutoff from 220 to 900 Hz and brighten a 1.8-5 kHz combustion hiss. Broad low-Q filters avoid a fixed whistle; independent left/right beds describe an extended front.

Events

brush fibres rupture 15-65 times/s, with 0.4-1 ms attacks and 4-20 ms noise decays; small damped wood modes add a 30-90 ms body. Fine embers form a quieter 2-7 kHz granular bed.

Flame sheets

overlapping 1.5-3.8 s turbulent surges in the 120-900 Hz band fold irregularly at 4 targets/s, representing whole patches igniting rather than a compact steady flame.

Bursts

tree pockets flare 0.15-0.8 times/s, with 15-45 ms attacks and 0.25-0.8 s turbulent tails; low wooden modes and a delayed softer fracture suggest trees further behind the advancing edge.

Envelope

irregular 5-15 s gusts drive level, spectrum and rupture density together; 0.8 Hz drift supplies smaller flame flutter. The sustained front remains active for arbitrary render lengths.

Variation

seeded event timing, strength, wood size and stereo position; macros set wind, brush, tree involvement and air absorption. Presets isolate scrub, gale, crown fire and a distant hillside.

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