Snake charmers usually play tunes on a wind instrument called a pungi or murli. This is a typical tune meant to make the snake sway and “dance.”

This song was sung in twinning ceremonies or festivals. The instrument, accompanying this song, is nung pa bil, a wind instrument with a reed. Nung pa bil is made of a hornless bamboo section with the length of thirty centimeters. One end with a reed with the length of two centimeters is separated from the section. On its body are seven holes drilled two centimeters from each other. Only men play this instrument.

According to statistics data in 2009, the Cao Lan people (known as Sán Chay) in Vietnam had a population of 169,410 people, residing mostly in Tuyên Quang province. The Cao Lan ethnic minority has a treasure of poetry, folk music, and dance such as sình ca (unique folk singing), múa trống (drum dancing), múa xúc tép (small shrimp catching dancing), múa chim gâu (cuckoo bird dancing), etc. The musical instruments of Cao Lan people are various, including thanh la (small knobless gong), não bạt (small cymbals), drums, bells, and wind instruments. Kèn is a wind instrument performed in festivals and ritual forms. Kèn consists of four parts: the body, the bell, reed stake, and the reed. The body is a cylindrical hollow tube made of hard wood about thirty centimeters in length. On the body, there are seven pressing holes on the front and one hole on back near the stake. The instrument bell is made of a frustum-shaped thin wooden piece. The smaller of the bell is attached to the big end of the tube. The stake is attached to the small end of the tube. The reed is made of a reed pipe or worn nest attached to the stake. Its sound is strong, a little discordant at high pitches and a little cracked at the low end. The register of the instrument is two octaves. Kèn is played by men only. This track is a medley of extractions that are often played in the rituals, such as hành quân (army operation), kèn Khắp, and đưa Phật (Buddha greeting).