Tritone Substitute: A harmonic device where a dominant seventh chord is replaced by another dominant chord located a tritone away, altering the harmonic progression.
Context and Significance
Tritone substitution is a pivotal concept in jazz and modern music, offering a way to enrich harmonic progressions with unexpected changes. By replacing a dominant seventh chord with a chord a tritone away, musicians can create smoother voice leading and more intricate harmonic textures. This technique is prevalent in jazz improvisation and composition, often used by pianists and guitarists to add complexity and interest to chord progressions.
Historical Background
The tritone, historically known as “diabolus in musica,” has been used for centuries to create tension. In jazz, the concept of tritone substitution gained popularity in the mid-20th century, allowing musicians to explore more adventurous harmonic landscapes. Its use has since expanded beyond jazz, finding its way into various genres due to its versatility in altering the tonal color of compositions.
Examples
Consider a jazz standard where a G7 chord is typically followed by a C major chord. By substituting the G7 with a Db7 chord, which is a tritone away, the progression gains a unique sound. Iconic jazz musicians like John Coltrane and Miles Davis have utilized tritone substitutions in their work, showcasing the technique’s effectiveness in creating innovative musical phrases.
Related Terms
Dominant Seventh: A chord commonly used in tritone substitution.
Voice Leading: The smooth movement between chords.
Chromaticism: Incorporating notes outside the traditional scale for harmonic interest.