Are you telling me this is AE: SIGN? (Autechre LP 14)

xp -- probably mostly the latter for me, plus CD-Rs being more likely to degrade over time than factory-pressed discs (Russian boots in my limited
experience have been factory-pressed)

but lukas is right that it's a ganzfeld on which I hallucinate my soul. I listened to it cranked, a few times in full, during a phase of my life where my emotions were basically unbearable and unprocessable, and it felt like being suspended as a cloud of atoms and was immensely healing to me.

I recently programmed some LED lights to create a visual ganzfeld while in a sauna listening to All End for 20 mins, and this description feels like it matched my experience a bit

my soul sibling

picking this up again after a year and I never realized how symphonic a lot of this album is. you could almost envision an orchestra playing it. guess I missed a lot of that because I'm not used to hearing stuff like that out of Autechre.