This is an amazing production and a worthy winner, but I'd love to know *how* you actually hook up an oscilloscope to an audio output to visualise it. Is the amplitude/voltage for the left audio channel one axis and the amplitude/voltage for the right audio channel the other, or is there some other way to do it? (Sorry, I am a coder not an electronics person, so what might seem obvious to others is not obvious to me!)

Normally you could use 2 sound channels, one for each axes (X,Y). For a cool demo see https://www.youtube.com/watch?v=qnL40CbuodU

Hey! Didn't see your comment until just now.

Yes, you guessed correctly. Its just a matter of hooking up the headphone jack of a Raspberry Pi B to an oscilloscope, where the left audio channel is the X axis, and the right audio channel is the Y axis. If you dont have a Pi, any audio device will do, but make sure that oversampling is disabled, and preferably the device is doing zero-order hold on the audio itself. Compression will actually degrade the image noticably, so, be sure to play the .wav file as-is, re: stereo, 8-bit, 48 KHz.

Additionally, if you search YT for "SQ2: An Oscilloscope Tech Demo", there's a full 5 minute long explanation of how the technology works.