causings is an improvisational music collective based in new york. their latest album is called '4 - hour body'. there is not much by way of explanation about how/with what equipment this album was made, but i can describe what it sounds like.
swells of vibration and electronic hum, bursts of static, the background noise of conversation and people going about daily business, clicks and clacks, squeaks and squeals, twangs on strings and bells and chimes, taps on surfaces. it's ambient in the purest sense.
get it for free from pan y rosasa discos