Dissonance
Dissonance in music refers to combinations of sounds perceived as tense, unstable, or unresolved. The term originates from the Latin dissonare (to sound apart) and describes intervals or chords that create an expectation for resolution to a more stable harmonic state. Dissonance is fundamentally relational—its character and impact depend on cultural context, historical period, and the listener’s familiarity with musical conventions.
Harmonic Function
In Western harmonic theory, dissonance contrasts with consonance, which describes sounds perceived as stable and complete. Common dissonant intervals include the tritone, minor second, and major seventh. Dissonant chords such as dominant sevenths or half-diminished chords typically resolve to consonant chords, creating a sense of forward motion in harmonic progression. This tension-and-release dynamic has been central to Western compositional practice since the medieval period.
Historical and Cultural Variation
The perception of dissonance shifts across musical traditions and eras. Intervals considered highly dissonant in medieval music became acceptable or even consonant by the Renaissance. Non-Western musical systems often employ different intervallic relationships and may not distinguish between consonance and dissonance in the same way. Contemporary classical music frequently embraces dissonance without resolution, treating tense sonorities as acceptable endpoints rather than requiring harmonic closure.