Shows the effect of multiplying two sinusoids that are close in frequency.

Shows how any periodic signal can be approximated as a sum of sinusoids.
It allows you to choose from several input signals and creates an approximati on
to the signal you choose.
You can select how mnay cosine terms to use in the approximation.

This program helps visualize the process of discrete-time convolution.

The Dirichlet function Demo lets you look at how changing L changes the Dirichlet function.

Illustrates the *sinusoid-in gives sinusoid-out* concept.