The pan flutes (also known as panpipes or syrinx

The pan flutes (also known as panpipes or syrinx) are a group of musical instruments based on the principle of the closed tube, consisting of multiple pipes of gradually increasing length (and occasionally girth). Multiple varieties of pan flutes have long been popular as folk instruments. The pipes are typically made from bamboo, giant cane, or local reeds. Other materials include wood, plastic, metal and ivory.

Etymology

The pan flute is named after Pan, the Greek god of nature and shepherds often depicted with such an instrument.

Pan and Daphnis – 1st century BC Roman replica of 2nd century BC Greek original

In Greek mythology, Syrinx (Σύριγξ) was a forest Nymph. In her attempt to escape the affection of god Pan (a creature half he-goat and half man), she was transformed in water-reed or calamos (cane-reed). Then, Pan cut several reeds, he placed them in parallel one next to the other, bound them together and made a melodic musical instrument. Ancient Greeks called this instrument Syrinx, in honour of the Muse, and Pandean, or Pan-pipes and Pan-flute, after Pan. The Syrinx, a predominantly pastoral instrument for the Greeks, was adopted by the Etruscans who played it at their festivals and banquets; the Etruscans called it fistula. 

The Romans adopted the Syrinx from the Greeks and the Etruscans, and they too played it at their banquets, festivals, as well as in religious and funeral processions.