Altered Scale: A scale that includes the altered versions of traditionally dominant scale tones, often used to add tension and resolution in jazz improvisation.

Context and Significance

The Altered Scale is significant in jazz music for its ability to introduce chromatic tension and complexity. It is most commonly applied over dominant seventh chords, particularly in jazz and fusion genres. Musicians use this scale to craft intricate solos that explore outside-the-box harmonies, adding depth and flair to their improvisational style. Instruments like the saxophone, guitar, and piano frequently employ the Altered Scale to enhance melodic lines and harmonic exploration.

Historical Background

The concept of the Altered Scale emerged alongside the evolution of jazz in the early 20th century, as musicians sought new ways to enrich harmonic language. It gained prominence as jazz improvisation became more sophisticated, offering players a tool for navigating complex chord progressions. The scale’s development parallels the shift towards more avant-garde and bebop styles, where traditional harmonic rules were expanded to accommodate greater expressive freedom.

Examples

A classic example of the Altered Scale in use can be found in John Coltrane’s solos, where he often employed it over dominant chords to create tension before resolution. Jazz fusion guitarist John McLaughlin also utilizes the Altered Scale to craft his distinctive sound, blending it seamlessly with modal and pentatonic scales in his solos. Such applications highlight the scale’s versatility and its ability to transform conventional harmonic ideas into innovative musical expressions.

Related Terms

Dominant Seventh Chord: A chord that often serves as a foundation for the Altered Scale.

Lydian Dominant Scale: Another scale used for chromatic coloration over dominant chords.

Bebop Scale: A scale with added chromatic notes for smooth phrase construction in jazz.

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