We have experimented with a range of light inputs and light sensors; the light changes the amount of resistance within the circuit; thereby affecting the tone or sonic parameter. When working with this aspect we are looking at the following dynamics;
>responsivity to light. How sensitive they are to changes in brightness
>width of response
>sound outputted (for example a Theremin like slow swoosh, or a rapid staccato beat)
Here are some of the light sensors we are testing.
Light Dependent Resisters
Infrared LED Sensors