1. The beginning is different: in major mode, the starting note is any note of 135, and it ends with any note of 15. The whole song has 135 as the main note, which is the major mode; in the minor mode, any note of 63 is the main note. The beginning note and the ending note can only be the 6th note, which is the minor mode.

2. Different tonal characteristics: major keys sound bright; minor keys sound darker.

3. Different styles: major keys give people a cheerful feeling; while minor keys have a sad tone.

In music, the assumed name of the sound used is called the sound name. The note names of the Western music system are represented by C, D, E, F, G, A, and B. They have fixed positions on the staff and keyboard instruments.

The level of the sound is called pitch, and the frequency determines the pitch. The faster an object vibrates, the higher the pitch of the sound it makes. The slower the vibration, the lower the pitch of the sound.

For example, in the key of C, with the starting note of 135, 1 as the main note, and the ending note of 15, it is the key of C major. With the 6th note as the main note and the 6th note as the ending, it is the key of A minor. Because the scale 1234567 in the key of C is represented by CDEFGAB, 1 (do) is C, C is a major triad, so it is called C major, 6 (la) is the corresponding letter A, and A in the key of C is Am, minor third chord, so it’s called A minor.