Scanjet Music
Popadopolis writes "Hack a day is reporting that HP Scanjets have a hidden ability to play music. According to the article, "The HP ScanJet 3c/4c have a variable speed scan head that is driven by a stepper motor. The Play Tune command can be used to move the head at different frequencies." They also have a video of a scanner playing "Fur Elise.""
Old news... I discovered this some 8 years ago! There was some software on the install floppy that came with it that played several different songs!
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For instance, as early as 1964, the IBM 1403 line printer was programmed to produce music. Here is a page with a song sheet. While I cannot find a reference, I remember someone else at IBM who used multiple tape drives as a kind of orchestra, also in the 1960s.
HP was happy enough about this that their old "HP Journal" -- a monthly tech. magazine that would go in-depth into HP technology -- had an entire sidebar about the exact escape sequences needed to play the music. It was a sad day when they stopped publication; it was a fun read.
The same issue had, as its cover story, an article about how strap-on heart monitors work. Very cool, and the cover picture, of a small baby with a monitor on its foot, was striking. The same technology was put onto my oldest several years later when she was in the hospital right after being born.
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