Chord refers to the sound produced by two or more notes at the same time. It is one of the important components of music. In a chord, each note has its specific pitch and duration, and together they constitute a rich and colorful musical world. According to the different types and composition methods of chords, chords can be divided into the following types:

1. Major chords

Major chords are composed of notes in the major scale Chords. In the major scale, the chords with the first, fourth, and fifth notes are major triads, the chords with the second, third, and sixth notes are minor triads, and the chords with the seventh note are diminished triads. Major chords are commonly used in different types of music, including pop music, classical music, and jazz, and are one of the most basic chord types in music.

2. Minor chords

Minor chords refer to chords composed of notes in the minor scale. In the minor scale, the chords with the first, fourth, and fifth notes are minor triads, the chords with the second, third, and sixth notes are major triads, and the chords with the seventh note are diminished triads. Minor chords are sadder and more melancholy than major chords, and are often used in tragic, lyrical and other styles of music.

3. Augmented Chords

Augmented chords refer to chords composed of a major third and an augmented fourth, generally expressing tension, suspense or uncertain emotions. Augmented chords are often used in different types of music such as pop music, film music, and drama music. They are one of the more special types of chords in music.

4. Diminished chords

Diminished chords refer to chords composed of a minor third and a diminished fifth, generally expressing sad, dull or depressed emotions. Diminished chords are often used in classical music, jazz and some slow songs, and are one of the more special types of chords in music.

5. Hanging 2 chords

Hanging 2 chords refer to chords composed of tonic, major triad and hanging 2 notes. They generally express expectations, future or unfinished emotions. The hanging second chord is often used in different types of music such as pop music, classical music, jazz, etc. It is one of the more common chord types in music.

6. Hanging Four Chords

Hang Four Chords refer to chords composed of tonic, major triad, and hanging four notes. They generally express emotions of mystery, uncertainty, or hallucination. Hanging four chords are often used in different types of music such as pop music, movie music, and classical music. They are one of the more special types of chords in music.

In short, chords are one of the very important components of music. They can present various emotions and atmospheres through different note composition methods and types. The above are the six types of chords, each with its own unique expression and emotional meaning.