The feeling created by this relaxing and tranquil wind chime is credited to an ancient Chinese pentatonic scale introduced in the 27th century BC by Ling Lun, a court musician under Emperor Huang-ti, the legendary Yellow Emperor. Lun first played this musical scale on pan pipes cut from different lengths of bamboo. In Chinese mythology, Lun was said to have created bamboo flutes which made the sounds of many birds, including the mythical phoenix. The perfect fifth, the basis of the pentatonic scale, is expressed by the ratio 3:2. Lun designed his flutes based on this principle, believing the relationship of 3 to 2 represented the harmony that exists between heaven and earth.