Here's an early test of a new computer drawing tool by Ze Frank, in which you use your voice to create pictures on your computer screeen.
You'll need a computer with a microphone to try this. You vary your voice volume to create different kinds of lines. For example, high volume makes the line turn clockwise, low volume makes it go counterclockwise, and medium volume makes it go straight. The drawing begins at the center.
Ze Frank would love to hear back from you with the results of this tool, which is still in beta.