Tran Quang Hai sings overtones (the Ode to Joy) in Campo Grande, BRAZIL. Tran Quang Hai sings overtones (the Ode to Joy) in Campo Grande, BRAZIL. QuangHai Tran Published on May 23, 2010 Tran Quang Hai sings the Ode to Joy with overtones and some other vocal techniques at the Music department, University of Campo Grande, Brazil,