This ingenius hardware hacker has pieced together a homebrew Mellotron (an early tape-based sample sequencer) out of dozens of old walkmans, each of which plays a continuous tape loop that is engaged with the amplifier by the press of a key:
This is my interpretation of the Mellotron, a classic instrument invented in the 1960s. It was one of the first sample players, and was used by The Beatles, and countless psychedelic and prog bands. The Mellotron played strips of tape to emulate flutes, strings, choirs, orchestras, etc. The flutes at the beginning of Strawberry Fields are a good example of the Mellotron.
My version, The Melloman, uses Walkmans and cassette tapes to play original Mellotron samples, or whatever cassette tapes you want to put in. Inside the box, there are 14 continuously running Walkmans mounted side by side. The first Walkman is designated for drums, and the next 13 provide sampled loops for 25 notes.
(Thanks, Brian!)