Generally speaking, the range of small class songs can be from c 1 to a 1, middle class songs can be from c 1 to b 1, and large class songs can be from c 1 to c2.
Range refers to the range of a person's voice or musical instrument from the lowest sound to the highest sound. The characteristic timbre of each sound zone plays an important role in music expression. High-pitched areas are generally crisp, loud and sharp.