If you have a microphone you may want to try this site out – instead of using the typical interface tools like mouse or keyboard, this Flash application requires you to use the microphone. A low volume tone will make the line curve counterclockwise, a medium will let it run straight and a high volume will turn the line to the right.
For example:
(no, that’s not my drawing – it’s an example on the site)
[via Today and Tomorrow]
