I produced this sound by programming a scale in a MIDI clip and then sending it to a virtual instrument designed to allow for freely manipulating granular synthesis through several seven point envelopes. I made several takes while I adjusted the envelops and other parameters.

One warning, this take has some piercingly high frequencies in a few places. The sound reminds me of some sort of scrambled futuristic alarm system. This led me to adding a warehouse reverb to the mix to put in into sci-fi thriller territory.

Reverberated Grain Table Noise