1234567 is pronounced do, re, mi, fa, sol, la, ti (si in China) in music, representing the 7 basic levels of the musical scale.

In the musical sound system, the seven tone levels with independent names are called basic tone levels. These seven levels correspond to the sounds produced by the white keys on modern pianos.

Generally, 1, 2, 3, 4, 5, 6, and 7 are used to represent musical scales in musical notation. The duration name of each number is equivalent to the quarter note of the staff.

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.

Extended information

The names of basic sound levels are marked in two ways: note name and roll call. The note name of each note level is marked by letters. The roll call is represented by pronunciation.

Take the key of C major as an example: the note names of the basic note levels of C major are marked from low to high as: C, D, E, F, G, A, B and their corresponding roll calls. It has seven pronunciations: do, re, mi, fa, sol, la, and si.

In the music system, the marks of the seven basic tone levels (note names and roll calls) are used cyclically. That is, after C, D, E, F, G, A, B, it goes back to c, d, e, f, g, a, b or after do, re, mi, fa, so l, la, si, it is still do, re, mi, fa, sol, la, si...and so on.

Baidu Encyclopedia—Simple Notation