My favorite track is the one by Aspects of Physics, a group that uses the word "manipulations" to describe what they do to machines to produce music. On their website they (literally) ask questions like this one:
At what point in society does the value of music in its relationship to society move from a productive beneficial tool to a commodity that doesn't necessarily help or perpetuate society?
2/7 members of Aspects of Physics. I'm pretty sure this is at Walden Pond.
Also, I'm into this video AoP made for "Song from Shitteo":