Roll call: 1 2 3 4 5 6 7?

Sound name: C D E F G A B?

Singing composition: do re mi fa so la si?

It’s called the “basic pitch level”. In addition to C D E F G A B, the widely used sound names include do?re?mi?fa?sol?lasi. Because these note names are mostly used in singing, they are also called "roll calls." Extended information

In middle school physics, everyone has learned the difference between music and noise. Music has a fixed pitch (frequency), while noise has no fixed pitch (frequency). There are 88 commonly used musical tones, which are the tones of the 88 keys of the piano.

The notes on the white keys are named with fixed letters and are named CDEFGAB. The C in the center of the piano is recorded as c1 (a group of Cs in small characters), the c to the right of c1 is called c2 (a group of Cs in small characters), and so on. The C to the left of c1 is recorded as c (small character group C), the next left is C (large character group C), the further left is C1 (large character group C), and the further left is C2 (large character group C). The rest of the sounds are deduced in this way.