The myDAQ Optical Theremin is a musical instrument which is played in a similar method compared to a real theremin. It uses two photodiodes as optical sensors for input from the performer and generates a sine wave which is output via the headphone jack. The performer moves his or her hands over the sensors to control the intensity of light. One sensor is used to control the pitch and the other changes the gain. When the user moves his or her hands up and down over the sensor the pitch and gain raise and lower accordingly.
