Synthetic atmospheric pad with a low bass flutter.
Free. All uses permitted, anywhere, by anyone at any time. No attribution required.
A simple "bread and butter" atmosphere that lends itself to industrial skyline, starship engine drone, subterranean ambient acoustic, or a general purpose background.
Includes a faint eerie wind noise, which is pitched high enough above the bass that it can be removed by simple lowpass filtering.
Also uses my (also free) BeerBottleWhoo.ogg http://www.freesound.org/people/Diboz/sounds/222882/ faintly in the background - I've left gaps where that sound doesn't occur, so you can chop out a whoo-less bit to make a loop without it if that's your preference.
Mostly made with LF filtered noise, tape flanging effect, reverb and a wee bit of phasing. The deepest sub-bass throb is felt, rather than heard. A steep bass cutoff filter at around 20Hz has been applied to help prevent budgies being blown off their little swings by 18" subwoofers.
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