AstroSynth is a MIDI controller designed with non-musicians in mind. It’s holes are spread all over the surface in a way that compels the user to explore the instrument in a hands-on, experimental fashion.
There are no right or wrong ways to play it. Each hole belongs to one of four modulation groups: Pitch, Time, Waveform and LFO. When a hole is covered with a finger, a light sensor inside sends a signal to the microprocessor, modulating the Synth’s parameter related to the group it was assigned with. The more holes of the same category covered, the more drastic the modulation will get.