Fugue for String Quartet in C major, K. 385m
von Wolfgang Amadeus Mozart
Mozart’s Fugue for String Quartet in C major (K. 385m) is a brief contrapuntal chamber fragment, generally dated to Vienna in 1782, when the 26-year-old composer was intensifying his study of “learned” styles alongside a newly confident Classical idiom. Although it stands outside the published quartet cycles, it offers a small, telling glimpse of Mozart testing fugal technique in the medium of two violins, viola, and cello.
Background and Context
In 1782 Mozart was newly established in Vienna, freshly married to Constanze Weber, and immersing himself in counterpoint—music in which independent lines are designed to interlock with strict logic as well as expressive intent. Around this time he not only wrote keyboard fugues and related pieces, but also arranged J. S. Bach fugues for string quartet (K. 405), suggesting practical, domestic performance as one likely context for such experiments.[1]
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K. 385m belongs to this Viennese moment. It is not securely tied to a specific occasion or patron in the way Mozart’s major chamber publications are, and it survives as a short, standalone fugal movement—something closer in scale to a study-piece or working-out of technique than to a multi-movement “concert” quartet.[2]
Musical Character
The work is, as its title indicates, a fugue: a tightly organized texture built from a single principal subject that is taken up successively by the four instruments. Even in fragmentary form, the quartet medium makes the underlying design unusually audible—each entry can be “seen” and heard as a distinct voice, while the inner parts (especially the viola) supply the connective tissue that turns a theme into a continuous argument.
In broad stylistic terms, the piece sits near the crossroads Mozart reached in 1782: an alert, Classical sense of phrase and clarity pressed into the service of Baroque-inspired procedure. Heard beside the larger quartet writing that would soon culminate in the “Haydn” set (begun later in 1782), K. 385m feels like a workshop view—brief, concentrated, and primarily concerned with the discipline of fugal interplay rather than with expansive lyric contrast or a full sonata-allegro drama.
[1] EarSense chamber-music overview of Mozart’s Bach fugue arrangements for string quartet (K. 405), dated to 1782 and relevant to Mozart’s contrapuntal work in Vienna.
[2] All About Mozart – “Mozart in 1782” catalogue-style list entry including K. 385m (Fugue for String Quartet), with key, year, and place (Vienna).