What does altered chord mean in music?
In the realm of music theory, the term “altered chord” refers to a chord that has had one or more of its notes altered, typically by raising or lowering them a half step. Altered chords are a fundamental component of jazz and modern music, providing a rich palette of colors and emotional expressions. Understanding what altered chords are and how they are used can greatly enhance one’s appreciation and ability to create music.
Altered chords are often created by raising or lowering the third, fifth, or seventh notes of a diatonic chord. This alteration can result in a variety of sounds, from dissonant and edgy to smooth and melodic. For example, a minor seventh chord (m7) can be altered by raising the fifth note to create a dominant seventh chord (dom7), or by lowering the third note to create a minor seventh flat fifth chord (m7b5).
One of the most common uses of altered chords is in jazz music, where they are often used to create tension and resolution within a progression. For instance, in the key of C major, the altered dominant seventh chord (C7alt) can be used to substitute for the dominant seventh chord (C7) in a progression. This substitution adds a unique flavor to the music and can lead to more interesting harmonic developments.
The altered chord is also a key element in the diminished seventh chord (dim7), which is a combination of two minor seventh chords that are a half step apart. The diminished seventh chord is often used to create a sense of ambiguity and tension, as it contains both major and minor third intervals, as well as a tritone.
In addition to jazz, altered chords are also used in other genres of music, such as rock, pop, and blues. They can be used to add complexity and depth to a song’s harmonic structure, or to create a specific emotional response from the listener.
Understanding the construction and function of altered chords requires a solid grasp of music theory. However, with practice and patience, musicians can begin to incorporate altered chords into their playing and compositions, enriching their musical expression and opening up new possibilities for creativity.
In conclusion, altered chords in music are a versatile and powerful tool for creating rich and expressive harmonies. By exploring the various possibilities of altering notes within a chord, musicians can unlock a world of new sounds and emotional expressions, enhancing their musical journey and that of their listeners.
