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pan flute

n. panpipes, a musical instrument, played by mouth, comprising tubes arranged in order of length.

Wikipedia
Pan flute

The pan flutes (also known as panpipes) 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 panflutes have long been popular as folk instruments. They are considered to be the first mouth organ, ancestor of both the pipe organ and the harmonica. The pipes are typically made from bamboo, giant cane, or local reeds. Other materials include wood, plastic, metal and ivory.

Usage examples of "pan flute".

We fed him a lot of Earth tunes, had him record them, got a fellow on Earth to front for him, and sold two million copies of pan flute records on late night television.

Also, he actually liked rock and roll, while most club owners Steve had known loathed it, preferring Yanni or Zanfir and his Pan Flute when they were alone in their cars.