The pinyin of the notes 1, 2, 3, 4, 5, 6, 7: do, re, mi, fa, sol, la, si Chinese: do, 唻, mi, fa, swish, pull ,West.

The digital musical notation is based on the movable solfa method, using 1, 2, 3, 4, 5, 6, and 7 to represent the 7 basic levels of the scale, which are pronounced as do, re, mi, and fa , sol, la, ti (si in China), represented by C, D, E, F, G, A, B in English, and rest is represented by 0. The duration name of each number is equivalent to the quarter note of the staff.

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The seven basic tone levels in the natural major mode are sung as do, re, mi, fa, sol, la, si (or ti) respectively. The roll call method of seven fixed syllables was invented in the 11th century by the Italian musician Guido. He used the first syllable of each line of a hymn he arranged as a roll call, which is still used today.