Diatonic Harmony: A system of harmony that employs the notes of a single key or scale. It forms the foundation of Western tonal music, utilizing the natural relationships between pitches.

Context and Significance

Diatonic harmony is fundamental in Western music, shaping compositions across classical, pop, and jazz genres. It is essential for creating a sense of home or resolution in music, through chords built on each degree of a scale. Instruments like the piano and guitar frequently utilize diatonic harmony to construct chord progressions that maintain a coherent tonal center, aiding in the expression of musical ideas within a given key.

Historical Background

The concept of diatonic harmony evolved during the late Renaissance and early Baroque periods, as Western music transitioned from modal to tonal systems. This shift allowed for greater harmonic complexity and expression. The codification of diatonic harmony reached its zenith during the Classical era, with composers like Bach and Mozart mastering its use to craft intricate yet balanced compositions that remain influential today.

Examples

Diatonic harmony is prominently featured in Beethoven’s Symphony No. 5, where it underpins the iconic opening motif, creating tension and resolution. In pop music, The Beatles’ “Let It Be” uses diatonic harmony to establish a comforting and familiar sound. Jazz musicians, like Miles Davis, often explore diatonic harmony to build solos that remain rooted in the song’s key while allowing for improvisation.

Related Terms

Chromatic Harmony: Utilizes notes outside the diatonic scale to add tension and color.

Modulation: The process of changing keys within a piece.

Tonality: The organization of music around a central pitch or chord.

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