Microphone techniques (the selection and placement of
microphones) have a major influence on the audio quality
of a sound reinforcement system.

By generating a stroke from a path line and animating the end point ...

How to create an animated form in flash using actionscript 2

by using Tile buttons you can apply different pattern to different parts of the line.

download Geometric brushes. ..

you can use a grayscale image as a gradient wipe ...