Grachov and Johnion are brothers. Grachov stays in Barcelona, while Johnion lives in Brussels.
In order to overcome the limits of verbal communication and physical distance, they have developed a composition system and a set of rules framing their behavior.
Hence, they have re-established the rules of their relationship.
This project is a sort of regulated “jam session” or a chess game in which the two players have a common goal:
to make good music.