What does 1 Chronicles 15:17 mean?

So the Levites appointed Heman (son of Joel), Asaph (son of Berechiah), and Ethan (son of Kushaiah) from the Merarites, to lead the singing. 1 Chronicles 15:17 - Modern Text Bible

(These three are chosen as the main leaders of the music, showing the importance of skilled, dedicated people in worship.)