DUC MINH sings with overtones, Hanoi, Vietnam, May 11th 2014 DUC MINH sings with overtones, Hanoi, Vietnam, May 11th 2014 QuangHai Tran Published on May 23, 2014 DUC MINH sings with overtones, Hanoi, Vietnam, May 11th 2014 Share this:TwitterFacebookLike this:Like Loading... Related Author: tranquanghai1944 Ethnomusicologist, composer and vietnamese traditional musician View all posts by tranquanghai1944