A power up sound for any sort of mechanical, high tech, or sci-fi charging up sound. Can also work for turning on jets and turbofans. This was recorded by a tascam dr-05 and is a printer cooling down reversed.
A laser noise created for my science fiction sitcom. The base was just a note from a vst synth (i can't remember which) and then a variety of pitch shifts, time stretches and layers of reverb until it sounded right.