For an example of the effect, here is an example -

Jerobeam Fenderson - Deconstruct

Link to the original TechMoan video that got me interested in the subject

Oscilloscope Music and Blender - a video by one of the originators of the technique

Jerobeam Fenderson - original Oscilloscope music artist

Oscilloscope Music Website

Software Oscilloscope - basically an oscilloscope emulator

Here are some other interesting ideas for oscilloscopes -

Video on an Oscilloscope

Quake on an Oscilloscope