FMScreen turns the iPhone into a musical instrument: an FM Synthesizer. Play, improvise, compose. Imagine the Theremin’s younger relative, only it fits in your pocket. Tap and slide your fingers on the iPod Touch/iPhone’s screen to generate sounds, control their frequency, duration, timbre and amplitude.
An FM Synthesizer generates simple waveforms that interact to create complex sounds of varying timbre. The interaction with the screen of the iPhone allows controlling the frequency of a sine wave (carrier), and the the amount of modulation (richness of the sound). The amplitude/volume of the sound is controlled by the inclination of the iPhone /iPod itself.