An interesting Perspective

http://www.jewsforjesus.org/publications/realtime/65/01?rt65

Lissajous anyone?

Here is a type of plot produced by the x y function on an oscilloscope sampling 2 different frequency sources at integer ratios. Beating patterns are are visible as collapses in the plot. This has to have some application in a really neat art-music medium.

http://en.wikipedia.org/wiki/Lissajous_curve

A Very Well-Written Article

http://www.thehoya.com/node/16934