Giovanni Battista Viotti

Quartetto d'archi (string quartet) denotes both a chamber ensemble of two violins, viola, and cello, and the repertoire written for that group. It is prized for its conversational balance: four distinct voices sharing themes, trading countermelodies, and creating transparent polyphony. Classical-era quartets typically follow a four‑movement plan (fast sonata form; slow lyrical movement; minuet/scherzo; lively finale), while Romantic and modern works expand, compress, or transform the pattern. Because the timbres are closely related yet individually characterful, the quartet is a laboratory for motivic development, harmonic subtlety, and rhythmic interplay. From its mid‑18th‑century codification to contemporary practice, it has remained the benchmark medium for intimate, architecturally rigorous musical thought.

Classical music is the notated art-music tradition of Europe and its global descendants, characterized by durable forms, carefully codified harmony and counterpoint, and a literate score-based practice. The term “classical” can refer broadly to the entire Western art-music lineage from the Medieval era to today, not just the Classical period (c. 1750s–1820s). It privileges long-form structures (such as symphonies, sonatas, concertos, masses, and operas), functional or modal harmony, thematic development, and timbral nuance across ensembles ranging from solo instruments to full orchestras and choirs. Across centuries, the style evolved from chant and modal polyphony to tonal harmony, and later to post-tonal idioms, while maintaining a shared emphasis on written notation, performance practice, and craft.