Play with light
Theremin I/O turns your iPhone into a touchless music instrument.
Camera + Flash
Theremin uses your iPhone's camera and flash to measure light reflected off your hand. This signal is then passed in to the synthesizer, creating a tone.
Theremin ships with 8 sound presets. Each preset has effect controls allowing you to create many unique sounds!
Never miss a note
Playing a theremin can be hard – that's why we bundle a harmony quantizer that snaps the frequency to a note. Create your own scale or select one from the many presets.
For the professional
By purchasing the MIDI upgrade you can use Theremin I/O as a digital controller. Send notes or control change signals to your favourite music software!