The sound of Paxiao is soft and elegant, and the low-pitched sound is deep and sad, with strong penetrating and vibrating power.

Especially the aftertaste of the weak playing is continuous, giving people the feeling of "like resentment, like crying, like complaining". The timbre in the midrange is round and beautiful, soft with firmness, gentle with inner strength, suitable for expressing a clear and spacious artistic conception. The treble is clearer and brighter, but slightly tense and sharp. Generally speaking, the flute uses the middle and low-pitched regions more, and the treble region is less used.

The timbre of the pan flute is similar to that of the flute, which is gentle and soft, with a long aftertaste, but it is more simple and original than the flute. Its pronunciation is also clearer, rounder and more hollow than the flute. The volume is not too loud, but its penetrating power and resonance are very strong. Listening to it playing, its sound seems to be boiling and oscillating from the bottom of the lungs. , especially suitable for playing deep and soft lyrical music. Among the wind instruments, although the pan flute is similar to the flute, it still has unique characteristics and abilities. In modern times, some people also use the pan flute to play popular songs or light music, and the effect is also very good.

The greatest charm of Pai Xiao is its clear penetrating power. The music of Pai Xiao seems to be floating from a distance, but it is still clearly audible, soothing and melodious.