The seven roll calls in music are:

1. The seven "roll calls" of the major scale are pronounced in order: do, re, mi, fa, sol , la, si (English Pinyin)

2. The "roll call" of the European and American "Alphabet Score" takes the first letter of Pinyin, and the seventh letter is changed to "Ladder t i" due to repetition: d, r, m, f, s, l, t,

3. The "roll call" of Chinese character music notation is: Duo, Lai, Mi, Fa, Suo, La and Xi.

4. The numerical numbers borrowed from mathematical notation are: 1, 2, 3, 4, 5, 6, 7.

Extended information:

Numerical notation represents the basic symbol of the pitch of the sound, marked with seven Alapa numbers, written as: 1, 2, 3, 4, 5, 6, 7 , i, the relative relationship between each tone is fixed. Except for 3-4 and 7-i which are semitones, the other two adjacent tones are all whole tones.

Any piece of music is composed of alternating high and low notes. From a direct view of the piano, the keyboard notes to the left are lower and the keyboard notes to the right are higher. As far as numbered musical notation is concerned, there are a number of dots "˙" and ":" symbols directly above or below the numbers. The number of dots can be understood as intensity. The more the dots, the stronger. Above them represent high notes and below them represent bass.

In addition to the pitch of the sound, another important factor is the length of the sound. The notation of the pitch and length of the sound determines which piece of music is different from other pieces of music, and therefore becomes the most important basic element that constitutes music. The principle is expressed in the duration of sound.