Drawing with Sound on an Oscilloscope

No CGI, no digital effects, no computer even; just some electrical testing equipment and an audio recording.  Pretty neat and a lot of fun to watch—so neat and fun that I was, in fact, pretty dubious at first.  So I borrowed an oscilloscope from my local public library and tried it out—AND IT WORKED!

Here’s Jerobeam Fenderson’s explanation of the effect, and another article with several neat videos.

Here’s Fenderson’s older “Drawing Mushrooms” video, which is the one I tested myself: