In music, rhythm refers to the arrangement and time interval of notes and rests, which is used to create the sense of rhythm and rhythm structure of music. Although rhythm can give music a specific feeling and speed, it does not directly represent numbers. Numbers are mathematical concepts, which are used to express quantity, count or measurement, and have no direct relationship with the rhythm in music. Although the rhythm of music can be expressed by numbers, for example, the rhythm speed is expressed by beats, this does not mean that the rhythm itself is a number.