Adachi Tomomi is a genius when it comes to sound and music. He has created some of the most creative instruments and synths made out of the most common house-hold items.
His new project is this synth shirt. It features infrared sensors housed inside the shirt that allows him to create some very trippy effects while using his voice as the base for the sound. By moving his hands, he can control the pitch, reverb, echo, among other things. Skip to around the 3 minute mark to hear when things get crazy.