Amnesiac - Radiohead

After Kid A, Radiohead were known as "pioneers of where music was going to go" etc etc, but I hadn't gotten to hear an album of theirs start-to-finish the day it came out. I was excited to buy a copy at the Sam Goody in the mall the day it released - I'm still mad at myself for not getting the special edition that came in a bound red journal.

This album changed what I thought music could do.

Coincidentally it's also how I test out every new piece of audio equipment.