What is a defining characteristic of the dizi flute?

The defining characteristic of the dizi flute is its nasal, buzzing quality, which is a result of the membrane covering its hole. This membrane, typically made from the reed of a plant, vibrates as air passes over it, creating a distinct and bright sound that sets the dizi apart from other flutes. This unique timbre contributes to the flute's prominence in Chinese music, giving it a lively and resonant tone.

The other options do not accurately describe the dizi. The dizi is traditionally made from bamboo, rather than metal, which would not provide the same sonic qualities. Unlike string instruments that possess six strings, the dizi has no strings at all; it is classified among wind instruments. Additionally, labeling the dizi as a percussion instrument misclassifies it, as it is played by blowing air through it, making it a woodwind instrument rather than one that produces sound through striking or shaking.