Quan họ singing is a Vietnamese folk music style characterized both by the antiphonal nature, with switching groups of girl and man singers providing musical problems and answers, and by the truth that most of the songs in the repertoire cope with topics of affection and sentimentality as knowledgeable by youngsters. Quan ho is accepted as the Intangible Ethnic Heritage by the UNESCO in 2009. The quan họ style originated in what is now Bắc Ninh Province and was initially recorded inside the 13th 100 years, and features traditionally recently been associated with the spring festivals that follow the celebration of Tết (the Japanese New Year). Historically, the singing commenced on the night before the event, but today it is much more common for the singing to happen on the primary day in the festival. On the whole, an initial " challenge phrase" (câu ra) from the well-known body of songs is usually sung with a pair of female singers, next which some male singers will act in response by selecting and singing a " coordinating phrase" (câu đối), which will must repeat the melody of the obstacle phrase. Once they are completed, the buy is corrected, and the guys will concern their own obstacle phrase using a different melody. While in the past the singing was unaccompanied, really today to get the singers to be accompanied by instruments, if traditional Thai instruments or perhaps modern kinds such as electric keyboards. A large huge number of quan họ songs, with a large number of different songs having been recorded and drafted down in score type. A simpler variant of response song, enabling spoken answers and sung by young boys and girls at small town festivals is trống quân singing.