If we had to choose an instrument to represent Vietnam, it would undoubtedly be the Dan Bau Tu Kham, since it is one of the few traditional musical instruments of purely Vietnamese origin. Its origin can be traced back to the 1770's. Among the many kinds of monochords from countries all over the world, such as the Indian Tuntina, the African Cung, or the Chinese Tushuenkin, only the Vietnamese Bau can produce such a popular and highly artistic system of harmonics.
The only string is usually tuned to the note C. The lowest note that can be played is the note G, which would correspond to a guitar lowest G, while the highest note would be a G two and a half octaves above Middle C. That is to say, it has a tree-octave register.
For beginners, the string is usually tuned to the tonality of the song that is to be played, so that it is easier. For example, if the song is in B major or Ab minor, the string should be tuned to the note B.
It has an output jack for amplification.
It includes buffalo horn pick and gig bag.
It is a very interesting instrument for harmonics!!!