We present a novel virtual musical instrument interface based on in-air 3D gestures called the Interval Player. Instead of specifying absolute notes, the user specifies the melodic interval between the most recent note and the next one. The non-dominant hand is used to specify chords for harmony. We discuss the principles and rationale used in the design.
Interval Player: Designing a Virtual Musical Instrument Using In-Air Gestures Conference
IEEE Symposium on 3D User Interfaces (3DUI Contest), 2015.