Fun Linux hack…Ever wonder what all the data in your hard drive sounds like? Or simply want to kill the silence in your server room? Simple, just direct devices into the audio device and listen to the sweet beatiful sound of your data (or other device). Reminds me of the good old days of 56k dialup. The more cluttered the data in your drive is, the more interesting the sound is. As root issue the following commands. Link.
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Going back even further, someone recognized that the signals emitted by an IMSAI 8080 (and the like) could be heard on the AM radio band. And he wrote a program (in BASIC) that would play songs from simple datafiles you could write.