Chord
A segment whose endpoints lie on a circle
A chord, in music theory, is a group of notes played together to create harmony. A chord typically consists of three or more notes played simultaneously, although two-note chords, known as dyads, can also exist. Chords are the building blocks of harmony and are essential in many different styles of music, including pop, rock, jazz, and classical.
Chords can be classified based on their function in a piece of music. The most common types of chords are:
1. Major chords – These chords have a bright, happy sound and are made up of a root, major third, and fifth.
2. Minor chords – These chords have a sad, melancholy sound and are made up of a root, minor third, and fifth.
3. Seventh chords – These chords are made up of a root, third, fifth, and seventh. They are commonly used in jazz and blues music.
4. Diminished chords – These chords have a tense, unstable sound and are made up of a root, minor third, and diminished fifth.
5. Augmented chords – These chords have a bright, tense sound and are made up of a root, major third, and augmented fifth.
Chords are often represented using chord symbols, which consist of a letter and additional symbols indicating the chord’s quality and any added or altered notes. For example, a C major chord is represented by the symbol “C,” while a C7 chord (C dominant seventh) is represented by the symbol “C7.”
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