TRAN QUANG HAI sings AMAZING GRACE with overtones in one breath 60 seconds 05.04.2018 by Hai Tran Quang TRAN QUANG HAI sings AMAZING GRACE with overtones in one breath 60 seconds QuangHai Tran Published on Mar 10, 2017 TRAN QUANG HAI sings AMAZING GRACE with overtones in one breath 60 seconds Miami, USA , march 10th 2017