the other link has a little, it's kinda just something i've seen around in different places when I was super curious about his music and how you'd produce stuff like that, specific ones I can find right now are in random threads[1] and in a red bull music interview he talks about it a tiny bit[2]

[1] https://llllllll.co/t/ppooll-max-msp-networking-system/28352

[2] https://www.redbullmusicacademy.com/lectures/tim-hecker-lect... (ctrl f for "P-P-O-O-L-L")

You can see it being used here at :22. The original title of this video is "Rewire - Studio Visit: Tim Hecker"

https://scontent-frt3-1.xx.fbcdn.net/v/t66.36240-6/10000000_...