Irregular Incurve has a similar construction structure as acoustic guitar. Instead of mounting strings on the neck, each string is mounted on an independent steel pipe. The steel pipes are fixed onto a curved shower rod by 3 pieces acrylic panels. Twelve controllable arms are mounted on the shower rod as well, which can pluck the strings by moving guitar picks. A homemade bridge transfers the vibration of the string to a spruce-wood sound box that sits under all the steel pipes. There are no nuts for different frets on each string. It only produces 12 simple tones. With the ability to change different strings and tuning manually, it can be used to perform different music.