This is a landmark track for the history of electronic music. A bit of background about this track: this track is off the Anti-EP which “was a protest against the Criminal Justice and Public Order Act 1994, which would prohibit raves (described as gatherings where music is played), with ‘music’ being defined as a ‘succession of repetitive beats’.” (Wikipedia, Anti-EP)
This track has no two successive measures with the same beat structure. Autechre released it specifically to be played loudly outdoors and at underground raves. And the EP came with a disclaimer stating that you should have a lawyer and a musicologist present to verify the legality and the non-repetitiveness of the piece should you get harassed.
In conclusion, Autechre are some OG ravers. Enjoy!