The Discrete Convolution Demo (dconvdemo) is a program that helps visualize the process of discrete-time convolution.
Features:

• Users can choose from a variety of different signals.
• Signals can be dragged around with the mouse with results displayed in real-time.
• Tutorial mode lets students hide convolution result until requested.
• Various plot options enable the tool to be effectively used as a lecture aid in a classroom environment.

This block diagram demo illustrates the property of linearity in FIR filters. Click on any of the blocks, the input or the output for a close-up.

This block diagram demo illustrates the property of time-invariance in FIR filters. Click on any of the blocks, the input or the output for a close-up.