I am looking for a quick instructable that will make two devices that change pitch based on proximity to its pair. It doesn't seem like it would be that hard, but I am not good with stuff like this (with soldering on boards and even knowing what all those things do) but I know enough to know that thats what its going to take.
Thanks for your help.
[edit: not really an edit, but more of an after thought, a post script if you will -- Think Geek makes a shirt like this but it uses lights as it gets closer... I want to use sound and frequency)