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 converting Type to Outlines you can edit and manipulate it..

by using Curves and Levels with blending Modes you can create subtle effect ...

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