ABCDEFG is arranged from low to high according to music theory tones: C, D, E, F, G, A, and B respectively correspond to the simplified notation 1234567.
Related introduction:
C, D, E, F, G, A, and B are the seven basic tone levels. The names of the basic tone levels have two marks: note name and roll call. Method, the note name of each note level is marked by letters. The roll call is represented by pronunciation.
The pronunciation of 1, 2, 3, 4, 5, 6, and 7 in the simplified musical notation is: do, re, mi, fa, sol, la, si. The notes are closely connected with the pitch. There is no one A note without pitch.
Extended information
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 the roll call, which is still used today (originally do was ut, si was sa, but later changed). In the specific use of solfa, there are two types: first-key solfa and fixed-key solfa.
The seven basic tone levels are repeated repeatedly to form the entire musical sequence. The sequence of notes starting from C to C, an octave higher, is called a group. A group of sounds usually starting from the C sound in the second space of the bass clef, marked with lowercase Latin letters c, d, e, f, g, a, b, is called a small character group, and each group upwards is called One group of small characters, two groups of small characters, etc.
Baidu Encyclopedia-Simplified Musical Score