The last seconds of air in a pipe organ, played with the bellows switched off. Recorded to a camera on a sennheiser ke66/k6 in oriel college chapel, oxford.
I recorded this sound back in 2002. A vent at the movie theater i worked was making this sound in the back of one of the theaters. So i recorded it between shows.
I found a lonesome party popper in my garage - recorded it wrongly sorry! should have shot it away from the mic rather than at it - get a big rush of air!. Sony minidisc.
The air con unit in our office regularly begins to howl like a storm wind. It was pretty difficult to capture. . . Had to come in early and setup a tascam dr-07 and let it run until the air starts to swirl and makes the noise!.