DurDreiklang

DurDreiklang is the German music theory term for a major triad. It comprises three pitch classes: the root, a major third above the root, and a perfect fifth above the root. The term describes the major triad quality and its characteristic consonant sonority.

Construction and examples: The essential intervals are a major third (4 semitones) from the root to the third, and a perfect fifth (7 semitones) from the root to the fifth. Examples include C–E–G (C major), F–A–C (F major), and G–B–D (G major). Inversions place a different member in the bass: root position (R–3–5), first inversion (3–5–R), and second inversion (5–R–3).

Function and diatonic context: In the diatonic harmony of major keys, major triads commonly appear on the first, fourth, and fifth scale degrees (I, IV, V). They typically function as tonic, subdominant, or dominant chords depending on context. On other scale degrees, the diatonic triads are minor or diminished, but the DurDreiklang remains a central building block for tonal harmony and melodic reasoning.

Notational use and repertoire: The major triad is often notated simply by the root, or as a major triad symbol in various traditions (for example, C or Cmaj). In German theory, it is contrasted with Moll-Dreiklang (minor triad). DurDreiklang forms the foundational sonority in many genres, including classical, pop, rock, and film music, and serves as a basis for extending harmony with seventh chords and other tensions.

Etymology: The term combines Dur (major) and Dreiklang (triad), reflecting its role as the major triadic sonority within tonal music.