CupCoder is a voice coder based on the string telephone. On one side we find an arduino, a microphone and a battery. The string that connects both cups contains a bending sensor, and On the other side there is a speaker and a pitch changing button (the pitch master). As you bend the string with the sensor, the parameters that control the pitch change and the input voice is modified in real time. The pitch can be altered to be very high or low.