Bought an old sony walkman from an antique mall. It was advertised as "radio works, but cassette player does not play. " this was true, and i was surprised at the noises it made when you tried to play tapes, though whether or not you have a tape or not it makes these types of noises when you switch it to the metal/chrome setting with dolby b on. You can add a 60 hertz hum if you touch any of the metal parts, and can somewhat mess the sound by messing with the spindles as they move. I may upload some more samples of this at one point, with cleaner recording of each of the sounds you can create.
Author: Waltzkon