Take one beat as an example, that is, take a quarter note as one beat, a whole note as four beats, a quarter note as two beats, a quarter note as one beat, an eighth note as one and a half beats, and a sixteenth note as a quarter beat.

1, the duration of notes is used to indicate the relative duration between notes in the score.

2. Basic correlation of sound values: the ratio of each larger sound value to its nearest smaller sound value is 2: 1. For example, a whole tone is equal to two semitones; Equal to four quarter notes and eight eighth notes; Sixteen sixteenth notes and thirty-two thirty-two notes. This is just the proportion of the duration of the notes.

Extended data:

Note duration and beat:

In music, time is divided into equal basic units, and each unit is called a beat or a beat. The duration of the beat is represented by the duration of the notes. The duration of a beat can be a quarter note (that is, taking a quarter note as a beat), a quarter note (taking a quarter note as a beat) or an eighth note (taking an eighth note as a beat).

2. The duration of the beat is a relative concept of time. For example, when the specified speed of music is 60 beats per minute, the time occupied by each beat is one second, and the half beat is half a second; When the specified speed is 120 beats per minute, the time for each beat is half a second, half a beat is a quarter of a second, and so on. After the basic time value of the beat is determined, the notes of various time values are associated with the beat.

Baidu Encyclopedia-Note Length