Add to ORKGIt happens quite often that someone sits down in front of a piano or takes another instrument and tries to play for the first time, but eventually quits trying after first few unsuccessful attempts. Random presses of the piano keys can become pleasant music only with a very small probability. Easy melodies are manageable, but what chords can accompany the melody and when to play them, what is tonality, what is for example modulation? These are concepts that most students are taught during their education in music schools. How can we bring music theory closer to those, who have not attended a music school or have not received musical education? Can music be visualized to make it easier to understand? Can we, like we can see that red and oran...