Silent Wholly by Automassage

Carolers singing a song of the season get drowned out for a few minutes by guitar and feedback sludge in this Silent Wholly wreck.

https://archive.org/download/birdsong041/04-Silent_Wholly.mp3

Get In The Ring by Automassage

Auotomassage does intriguing meandering rock/post-rock tracks like Get in the Ring, all for free (non-commercial) use.

Get the track in a lot fewer bytes with vorbis

https://archive.org/download/birdsong041/02-Get_in_The_Ring.mp3
https://archive.org/download/birdsong041/02-Get_in_The_Ring.ogg

Death In 7/4 by Automassage

Trying to describe Death in 7/4 leads me to appreciate it more because it's difficult to describe. It's noise rock mixed with slow quiet section and mantra-like distorted vocals.

Also available in vorbis.

https://archive.org/download/birdsong041/03-Death_in_7_4.mp3
https://archive.org/download/birdsong041/03-Death_in_7_4.ogg

So Yes by Automassage

"So Yes, you can take the negative path...". What follows is a swirling sludge of instrumental rock bliss.

Enjoy vorbis.

http://ia700803.us.archive.org/28/items/birdsong041/01-So_Yes.mp3
http://ia700803.us.archive.org/28/items/birdsong041/01-So_Yes.ogg