Click start to hear and see some Oscilloscope music
This is not an animation.
These graphics are the visual output of specially created music, produced by combining the stereo waveforms. The sound artist is Jerobeam Fenderson (oscilloscopemusic.com) who creates music that can be visualised through an oscilloscope.
I'm using the HTML5 Audio API to the play and interpret his tracks, and running the visualisation through canvas.
This demo is using the track "Spirals", which I chose because renders cleanly, gets interesting quickly, and doesn't sound too harsh. I highly recommend you check the whole album which you can buy complete with videos. The results through the oscilloscope have a smoother feel, if you have one to hand.
I bought this music, which is released under Creative Commons BY-NC-SA 4.0 which allows me to freely use and share this with you, as long as I share my work.
This is my code, standing on the shoulders of giants.