Hardware interface for the electro-instrument "ctrlKey". These hardware elements send gestural control data to the mapping and synthesis software. Generally, the gamer key pad is used to start synthesis and algorithmic processes that make sound, the joystick is used to shape the sound. Buttons and faders in the center are used to select sound transformations, scenes, signal routing and to set parameters that have a global influence on the output. Both the joystick and the keypad have a hatswitch that allows both thumbs to have expressivity control.