Taking 4 tracks in Adobe Audition, I added a few different effects and got them to loop and add to the original 12 second piece, then I re recorded this through Audacity.
The original sounds are from the same metronome track as I used before, just split and stretched down to one beat, plus the regular track underneath to give a sense of drive and rhythmn.
It does get ear splittingly loud at one point, verging on the painful, but deployed at the right point in a piece it would have the desired effect.
I would have like to have had more control over the ending and the extremely loud part, but I just don’t have the know-how in Audition. This is why I had to re-record it in Audacity because the 12 second piece kept adding to itself through the effects and that was part of what I really liked..