Found sound: mysterious, odd, obscure, indiscernible stuff found on thrift store, family hand-me-down, etc. -type tapes, CDs, etc. Personal example - strange-looking old c40-length cassette with recording from military-communications-type radio of Bible sermon, with incidental/unintentional harsh noise and feedback from moving around the room (presumably). Fake Arabic writing on J-card which native speakers couldn't read or translate.
Anyone use strange found material frequently? Know of any titles or tracks entirely composed of strange, found sounds? Any decent examples of strange sounds you've found somewhere on some recording?