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I never expected developers to put easter eggs into hardware. I was wrong: The HP ScanJet 4c
here plays
"Für Elise" using Hewlett Packard's SCL (Scanner Control Language) command set. The
(unofficial) PLAY TUNE command basically varies the stepping rate of the scanner motor to produce audible frequencies. All it needs is a series of note frequencies and durations. Source code at:
www.ganjatron.net/misc/scanjet
.
