JS Oscilloscope

Original code written by Neil Fraser.

Plug your computer's audio output into an oscilloscope (right = X, left = Y), then use your mouse to draw in the square below.

If you are using different shapes try to keep end and start points as close as possible to avoid spurious lines. The more things you draw the more flicker you'll get. You can use Clear to start over. Using the text-Image you can set an image URL used as background which might help as a template. Using a lower sample rate might get a more stable and clean image but will show more flicker.