i used Ableton live and made 6 copies of the same track

then i added 2 tracks with mac startup and error sounds

these were found online thru google search

i added a compressor to al the tracks

and started by pitching -/+ each track until

i got a general wall of noise

using the draw mode as the track looped i adjusted the volume and panning of each track

this final composition was exported and touched up in audacity

the only fx used were track reverb ,delay and general compressor