So I'm always interested in trying to make robotic and mechanical sounding music, and one of the things I like to do is use recordings of servos and other types of electrical motors. No exaggeration, I have folders full!
This sound started out as an attempt to synthesize the same type of sound, although I ended up getting quite sidetracked.
The sound started off as something resembling a servo, but I decided to try playing about with it in Absynth, I've really fallen in love with the Granular sampling features it has.
I thought it might be fun to try and turn the servo noise into something a little more atmospheric, and Absynth is always great for that type of thing. The servo noise got time stretched with an envelope changing the time parameter. That then runs through a Low Pass filter with a very fast LFO modulating the cut off frequency slightly, to give a bit of colour to the sound. Next it's going through a frequency shifter set very low, which is what causes the gating, and finally through a panning delay effect.
GATED FREQ SHIFT SERVO by Noisy Neighbour Sound
It's not quite what I had in mind when I started, but I guess that's just how it goes sometimes. Still came out with a pretty nice sound, more musical than atmospheric perhaps, but that's maybe not such a bad thing!