In soundtrack three, the bouncing triangles are there to represent the ghostly figures from the characters military past. There was a swell which I created for a game last year which worked well to put in then reverse it to fade out. As shown here. I wanted a very middley sound in the EQ which is why I have dipped the top and bottom ends out. This piece is meant to represent sadness, so I didn’t want any sounds too overwhelmingly high pitched as it would disturb your ears. The next effect is Ableton’s Corpus effect. Corpus is a resonator that works as if your audio is striking a surface. You can see that the surface being struck is a tube, and it has been tuned quite low. This Corpus effect adds in an extra layer of dynamics to the sub bass level of hearing.
You can hear these ghostly fades here: https://soundcloud.com/svrdophobia/ghostly-fades