In the same note column, the E key is higher, such as E4 is higher than D5. If it is not in the same note column, it is closer to the pitch of the high range, such as D5 is higher than E4.

Related introduction:

Arranging musical sounds in order of high and low is called "sound sequence". Each note is arranged from lowest to highest: CDEFGAB.

In the music system, the marks of the seven basic tone levels (note names and roll calls) are used cyclically. That is, C, D, E, F, G, A, B then return to c, d, e, f, g, a, b.

The pitch of the note level in each cycle is different, that is to say, although the note name (or roll call) is the same, the pitch is different. When marking sound names, use uppercase or lowercase, or add subscripts after capital letters and superscripts after lowercase letters to distinguish them, that is, grouping of sounds.

Extended information

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 the lowercase Latin letters c, d, e, f, g, a, and b, is called a small group.

From this point on, each group going up is called one group of small characters, two groups of small characters, etc.; each group going down is marked with capital Latin letters, and is called a group of large characters, one group of large characters, two groups of large characters, etc. The small C in the group is located on the central plus line of the large staff, so it is called middle C; it is also located in the center on the keyboard.

Baidu Encyclopedia-Basic Sound Level