I took my touch piano a slight step forward today and created a musical distance sensor and LED show.  Your body now acts as the keyboard using GHI distance sensor.  I’ve also added sharp and flat notes to the scale.  It will sound a little “less musical” as I’m not moving in any particular key.  However, it could be imagined that an array of people with sensors and speakers could result in a coordinated musical ensemble.

This project can be found in my GitHub repository in the MusicalDistanceSensor solution.

The hardware setup is below:

Here is a picture of the hardware assembly: