Styles of overtone singing – Tran Quang Hai interview, 2014, RAVENNA , ITALY 05.02.2018 by Hai Tran Quang Styles of overtone singing – Tran Quang Hai interview, 2014 , RAVENNA, ITALY voceartistica Published on Apr 22, 2014 Interview with Master Tran Quang Hai Tran Quang Hai