When playing the squeak, the tube body is placed vertically, the right hand presses the three holes, the left hand presses the three holes, and the mouth contains the air inlet port mouthpiece, but the lower lip cannot block the upper tube mouth. The barrel tone is a1, and the sixth hole emits a high octave. Through flat blowing and super blowing, the sound range is a1-a3.

The gasu tube body is made of bamboo and is made of thin bamboo tube without knots. The general tube length is 36 cm, the outer diameter of the upper tube opening is 1.6 cm and the inner diameter is 1.2 cm, and the lower tube opening is 1.4 cm in outer diameter and 1 cm in inner diameter.