The register is the high and low range of the sound.

Although it has a conventional concept, it does not have very strict and exact boundaries. The so-called high-pitched area, mid-range area, and low-pitched area are relative terms. The standards for dividing various musical instruments and various human voices are different. For example, the middle C on a piano, that is, the C sound in the middle of the entire keyboard, is the low range for a violin, but for a double cello, it is the high range; similarly, the high range of a bass is the mid-bass range of a soprano. District, etc. The range we are talking about here is in the category of a complete orchestra or a complete chorus. Its concept is broad and not specific to a certain instrument or a certain kind of voice.

Vocal register is a very important means in music writing. Different vocal registers can express different thoughts and feelings, imitate sounds in life and nature. At the same time, changes in vocal registers in works will also bring about Come for some fresh fun. Generally speaking, the high-pitched area generally has crisp, bright, and sharp characteristics; while the low-pitched area often gives people a rich and deep feeling (please note: various elements in music cannot be used in isolation, they are combined with other Various effects can be produced when elements are combined). When imitating the rumble of thunder, composers often use timpani in the lower range; when imitating the melodious singing voice of a skylark, they use woodwind instruments in the high range; when expressing tranquility and contemplation, they often use the dignified and deep range of the cello; When expressing elegant thoughts, the violin part may be allowed to sing softly in the high register.

The beat of music is the unit of music time, which is what we usually call "beat one" or "beat two".