A band is already a musical system: several people listening, reacting and making decisions at the same time. The TMA Device adds another layer to that system, giving the players a shared view of harmony, rhythm and musical structure as the music develops.
A band is more than a collection of individual musicians. What one player does changes the possibilities for everyone else, and the most interesting moments often happen when those relationships are understood intuitively rather than consciously.
Each musician can work from the same underlying musical information while still playing their own instrument, making their own decisions and responding to the rest of the band.