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The Baroque period (roughly 1600–1750) marks the emergence of tonal harmony, the basso continuo texture, and new genres such as opera, concerto, and suite. Baroque composers — including Monteverdi, Vivaldi, Handel, and Bach — organized music around the 'doctrine of the affections,' matching musical gestures to specific emotional states. The period saw the codification of major-minor tonality displacing the older modal system, and the development of functional harmonic progressions as the primary organizational force in music.
Contrast a Renaissance motet with a Baroque piece by Handel or Bach to feel the shift from modal counterpoint to tonal harmony and basso continuo texture. Listen specifically for the active bass line supporting clear harmonic progressions.
To understand what the Baroque period represents, it helps to start from what came before. Renaissance polyphony — the music you encountered in the prerequisite — organized sound as a weave of equal, independent voices guided by modal scales. No single voice dominated; harmony was a byproduct of melodic lines coinciding, not a goal in itself. The Baroque upended this by reorganizing music around a new polarity: a strong bass line at the bottom, a singing melody at the top, and harmonic filler in between. This is the basso continuo texture, and once you hear it, you hear it everywhere in the period.
The basso continuo was both a compositional principle and a performance practice. A cellist or bass viol player performed the written bass line while a harpsichordist or organist realized the harmonies above it using figured bass notation — numbers and symbols written below the bass that indicated which chords to play. This system assumed harmonic understanding on the part of the performer (which is why figured bass is a soft prerequisite here). It also meant that Baroque ensembles always had a harmonic engine keeping things grounded, freeing melodic instruments to ornament and embellish freely.
Underneath this textural shift was a deeper theoretical change: the displacement of the modal system by major-minor tonality. Renaissance music operated in a family of modes (Dorian, Phrygian, Mixolydian, etc.) with fluid tonal centers. The early Baroque gradually clarified two modes — major and minor — and developed the functional harmonic progressions (I-IV-V-I and their variations) that would dominate Western music for the next three centuries. This shift gave music stronger directional pull: chords wanted to move somewhere, creating tension and resolution that felt more propulsive than Renaissance harmony.
The doctrine of the affections gave composers a framework for what music should do expressively. Each movement or section was meant to sustain one unified emotional state — grief, joy, martial resolve, pastoral calm — and every musical choice (tempo, mode, melodic contour, rhythmic pattern) should serve that single affect. This explains a distinctive feature of Baroque music: its movements tend not to shift emotional register mid-stream the way later Classical or Romantic music does. A sarabande stays mournful; a gigue stays energetic.
The Baroque produced entirely new genres that would define Western music going forward: opera (drama set entirely to music), the concerto (soloist versus orchestra), the fugue (a rigorous contrapuntal form), the suite (a collection of stylized dances), and the oratorio (sacred drama for voices and orchestra). These forms emerged from composers experimenting with how the new tonal language, the basso continuo texture, and the doctrine of the affections could be deployed across longer, more ambitious structures.
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