nowaysj wrote:In that case, maybe an initial really quick filtered noise sweep followed by a few pitches quickly swept down at different rates, get an inharmonic kind of whine, followed by a few filtered noise sweeps to make that kind of sigh at the end. All this in about a seconds worth of time, with maybe the noise tail sustaining/fading a bit past a second?
Noways is right, a noise osc & filter will be usefull in achieving the sound you're after.
I'd layer two noise oscillators which will help recreate both the attack portion of the sound and the sustain.
Osc 1 needs to have a super fast attack and decay to give it an almost snare like quality. Pitching it very low will give it more of a 'puh' sound. It y help to have it slightly louder than the sustain portion. This will mask the slow attack of the sustain portion. Possibly low pass filter it, but this depends on what you want.
Osc 2 needs a medium/slow attack which will need to be timed correctly with the attack section on osc 1. Osc 2 needs to be piutched several octaves higher than osc 1 so that it is 'airier'. Possibly bandpass filter it.
Maybe also add some reverb to taste?