Duet of overtone singing – Bạch Yến & Trần Quang Hải, LIMEIL BREVANNES, FRANCE, 05.2009 QuangHai Tran Published on May 23, 2009 Trần Quang Hải and his wife Bạch Yến showed the way of using overtones to sing together . She sang the fundamental in C# and Trần Quang Hải sang the fundamental in […]