In short, C 1 generally stands for alto, and C2 generally stands for treble.
First, an octave is divided into twelve parts. There are seven basic levels, namely CDEFGAB, and these are their sound names. There is also a name that uses the name of do, re, mi, fa, sol, la and si. ?
The middle note C belongs to a group of small characters called c 1, and the next octave C is a group of small characters called c2. The sound between these two sounds is small.
The origin of vocal music:
The earliest collection of poems in China (The Book of Songs) and a large number of rap arts similar to the art of songs, such as Chu Ci, Tang Poetry, Song Ci, Yuan Qu and so on, are the sources of Chinese national vocal music.
By the time of Emperor Yao, there were already relatively complete songs, such as Six Generations of Music and Dance. Singing at that time was only a comprehensive art of poetry, music and dance, which could not be completely defined as an art form. It was not until it entered the feudal society and became an artistic activity loved by people throughout the ages that it really became a relatively perfect art.
In this historical process, there have been many professional singers engaged in singing. Such as: Qin Qing, the most outstanding singer and vocal music teacher in the Warring States Period. His songs can spread all over the fields, shake trees and write "Stop the clouds." Another example is Han E, an outstanding female singer during the Warring States Period. Her singing "reverberates around the beam for three days" vividly depicts her superb singing skills and high singing level.