The Darkest of the Hillside Thickets
I may have mentioned this before. My first encounter with The Darkest of the Hillside Thickets was at an early DragonCon, when I walked in on one of their concerts towards the end. What I remember most is that at the very end, someone dressed as Cthulhu came out and killed all the band members on stage. It was amazing. I’ve been a fan of their non-Euclidean music ever since. This is a selection from their 2007 album The Shadow Out of Tim.
A solid source for their madness is their Bandcamp page.