An anonymous reader writes: Thought your readers would like this.. I have a hobby of retrofitting ancient electronics for modern uses. Over the past couple weeks, i've been writing/perfecting code that converts 1-bit images to into audio files that can be played against an oscilloscope. (I've been told the results look...creepy, so, I made it extra creepy here for fun.) Admittedly, the whole thing it's ostensibly pointless, but it does serve as a demonstration of what can be done with a single Raspberry Pi, a beam of electrons, and a half-century-old vacuum tube driven display coated with phosphorus.