I still am just amazed at this. Let's just ignore the technical aspect. If you remove that aspect entirely, you still are left with some of the best composition to even exist. Not just on Audiotool, but in the entire industry. It is perfectly tense, perfectly calm, perfectly interesting, perfectly full, perfectly long, etc. The sounds are beautiful in their mourning, beautiful in their sorrow, beautiful in their loneliness. I will love this song until the day I die.
The sounds are coming from the delays.. If you slap enough of them on a sound, at the right bpm, you can make the delayed automation and note tracks come in 1 or so minutes later, as the main lead is still playing. It's really wacky, and I'm not quite sure how it works to the full extent. It's really cool though. You should study the draft, and maybe you'll figure it out for yourself xd