Mono-string

It's called Dan bau in Vietnamese, and is an instrument that was invented by a Vietnamese peasant. As its name says, it has only one string, and therefore, it is played differently from one person to another, what makes a good performance is the vibration of the left hand because it transfer the emotion, feeling of the musician into the song.

Vietnamese traditional music has only 5 musical notes: do, la, sol, re, mi. The mono-string has 5 notes on the string. So, for one person, it can be do somewhere, for the other, it's another place on the string...