Violin Sonata No. 28 in E♭ major, K. 380 (1781)
ヴォルフガング・アマデウス・モーツァルト作
Mozart’s Violin Sonata No. 28 in E♭ major, K. 380 was composed in Vienna in 1781, when the 25-year-old composer was newly established as a freelance musician in the imperial capital.[1] Often described (with good reason) as a keyboard-led sonata with violin, it nonetheless offers some of Mozart’s most refined duo writing of the early Vienna years—especially in its poised, characterful slow movement.[1]
Background and Context
When Wolfgang Amadeus Mozart (1756–1791) arrived in Vienna in 1781, he was intent on remaking his career. The city offered celebrity, a sophisticated market for published music, and a thriving culture of domestic music-making—conditions that favored chamber works designed for skilled amateurs as well as professionals. The violin-and-keyboard sonata was especially well placed in this environment: it could function as salon music, teaching repertoire, or a genuine concert piece depending on the players and the venue.
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K. 380 belongs to a first, tightly grouped cluster of Mozart’s Vienna violin sonatas from spring and summer 1781 (including K. 376, K. 377, and K. 379). The New Mozart Edition explicitly treats these works as a coherent early-Vienna group, situated alongside Mozart’s violin-and-keyboard variation sets from the same period.[1] That positioning is revealing: in these sonatas, Mozart is thinking not only in terms of “accompanied keyboard music” but also in terms of dialogue, character variation, and the subtle redistribution of musical foreground and background.
Composition and Dedication
The sonata is generally dated to Vienna, 1781 (summer or mid-year in many catalog summaries), and it was later issued as part of the set of six sonatas published by the Viennese firm Artaria at the end of 1781 (K. 296 and K. 376–380). Contemporary documentation around that publication survives: Mozart wrote to his father on 24 November 1781 that his sonatas had appeared in print, and correspondence in December confirms he had sent the newly published set.[2]
This Artaria collection is widely known as the “Auernhammer Sonatas,” dedicated to Mozart’s pupil Josepha Barbara Auernhammer (1758–1820).[3] The dedication tells us something about the intended world of the work: not merely private dilettantism, but a cultivated Viennese pianistic milieu in which a talented player (Auernhammer was praised by Mozart, if also teased in his letters) could relish brilliant keyboard writing supported and animated by a responsive violin line.[3]
Form and Musical Character
In its scoring and rhetorical priorities, K. 380 exemplifies a hallmark of Mozart’s Viennese violin sonatas: the keyboard part typically bears the primary thematic and harmonic responsibility, while the violin alternates between doubling, commentary, and brief moments of leadership. Yet to hear this as mere “accompaniment” is to miss Mozart’s craft. The violin frequently supplies articulation, color, and timing—small inflections that sharpen a cadence, lighten a texture, or turn a phrase from polite to pointed.
The work is in two movements (a design Mozart sometimes adopted for this genre), and sources commonly list them as:[4]
- I. Allegro
- II. Andante con moto
The opening Allegro proceeds with the easy confidence of Mozart’s mature Classical syntax: balanced themes, lucid harmonic pacing, and a texture that invites the pianist to sparkle without overwhelming the partnership. Its attractiveness is not superficial; rather, Mozart achieves variety through rapid alternations of register, conversational hand-offs between instruments, and a nimble sense of proportion. Even in passages where the violin doubles keyboard material, it can function like a “second voice” in opera—shaping the same line with different breath and emphasis.
The second movement, Andante con moto, is the sonata’s particular claim on a listener’s attention. Mozart’s marking suggests a tempo that moves—never static—yet remains inward in affect. Here, the duo writing becomes more “chamber-like” in the modern sense: the violin’s entries feel motivated by the musical argument, not simply added for color. The movement’s sustained cantabile (a singing style) and its careful balancing of intimacy and forward motion give the sonata a distinct profile within the 1781 group, and help explain why K. 380 can feel more psychologically focused than its modest scale might imply.
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In short, K. 380 deserves attention not because it is a grand virtuoso vehicle, but because it is a finely engineered piece of Viennese musical rhetoric: economical, eloquent, and sensitive to how two players can create the illusion of a much larger drama.
Reception and Legacy
As part of Artaria’s end-of-1781 publication, K. 380 entered the marketplace early and directly—an important point in Mozart’s Vienna story, since printed chamber music could function as both income and advertisement. Mozart’s own letters confirm his awareness of these sonatas as public-facing works, newly “out” in the city’s musical economy.[2]
Today, K. 380 is not as ubiquitous in the concert hall as Mozart’s late violin sonatas (such as the expansive Violin Sonata in B♭, K. 454), yet it remains central to understanding how Mozart cultivated a specifically Viennese chamber style in 1781—one poised between domestic utility and genuine artistry. Its best performances do not try to “inflate” it into something symphonic; instead they bring out its strengths: the keyboard’s brilliance as a social art, the violin’s ability to animate the line with speech-like nuance, and—above all—the slow movement’s quiet insistence on musical character.
[1] Digital Neue Mozart-Ausgabe (International Mozarteum Foundation): NMA VIII/23/2, foreword discussing the Vienna 1781 group including KV 379/373a, 376/374d, 377/374e, 380/374f.
[2] MozartDocuments.org: contextual documentation on Artaria’s end-of-1781 publication of the six violin-and-keyboard sonatas and Mozart’s letters of 24 Nov and 15 Dec 1781 mentioning their publication/shipment.
[3] Josepha Barbara Auernhammer (Mozart’s pupil and dedicatee of K. 296 and K. 376–380): biographical summary and dedication context.
[4] IMSLP work page for *Violin Sonata in E-flat major, K. 380/374f*: basic work identification and movement listing.