This is a way to make emotional music without having to learn music theory by converting your face into a MIDI controller, analyzing your mood and using that as the basis for generating appropriate chords. For example, smiling and happiness creates a major chord, whilst sadness and frowning result in minor chords. There are over 100 emotions mapped, from surprise and shock to anguish and fear, each with their own chord and musical mode.
Make music depending on how you feel.