Definition of a Musical Chord
A musical chord is a harmonic set of pitches consisting of at least three notes, known as chord tones, that are sounded simultaneously. These notes are typically derived from a scale and arranged in a specific order, forming the building blocks of harmony in music.
Key Components of Chords
Chords are constructed using intervals between notes, with the most basic form being the triad, which includes a root note, a third, and a fifth. Major chords evoke a bright sound due to a major third interval, while minor chords produce a somber tone with a minor third. Extended chords, like seventh chords, add further notes for richer harmony.
Practical Example: The C Major Chord
Consider the C major chord, formed by the notes C (root), E (major third), and G (perfect fifth). On a piano, these are played together by pressing the white keys C, E, and G in the middle octave. This chord is commonly used in songs like 'Let It Be' by The Beatles to establish a stable, uplifting harmonic foundation.
Importance and Applications of Chords
Chords are fundamental to music composition and performance, providing structure and emotional depth to melodies. They are applied across genres, from classical symphonies to jazz improvisations and pop progressions, enabling musicians to convey tension, resolution, and mood while supporting vocal lines or solos.