5 Divertimenti in B♭ major (doubtful), K. 439b
di Wolfgang Amadeus Mozart
Mozart’s 5 Divertimenti in B♭ major (K. 439b), traditionally dated to Vienna in 1783, survive as a group of short wind pieces whose attribution to Wolfgang Amadeus Mozart (1756–1791) remains doubtful. Read today as deft, practical ensemble music for low clarinets (basset horns), they sit close to Mozart’s Viennese fascination with wind color—yet without the secure documentary footing of his authenticated serenades.
Background and Context
In 1783, Mozart was 27 and newly established in Vienna, writing with growing assurance for the city’s mixed public and private musical life—keyboard works for himself, ambitious projects such as the Mass in C minor (K. 427), and, increasingly, music that explored the expressive range of winds.[1]) Against this background, the cluster known as the 5 Divertimenti (K. 439b) is usually placed in Vienna around 1783, but the sources do not permit the same level of certainty one has for Mozart’s self-documented works; no autograph is known.[2]
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Musical Character
What is clear “on the page” is the intended sound-world: these divertimenti are transmitted as wind trios closely associated with the basset horn (a low, mellower member of the clarinet family), and modern editions and performance practice commonly realize them for three basset horns (or practical substitutes such as two clarinets and bassoon).[3] Their rhetoric is that of convivial Viennese Harmonie music in miniature: clear periodic themes, balanced phrase structures, and a frequent preference for textures that distribute melody and accompaniment among three equal-ish voices rather than treating the lowest instrument as a mere continuo.
Across the set, listeners can expect the standard divertimento “diet” of the period—bright opening allegros, lyrical slow movements, and dance-derived writing (especially minuets) shaped for amateur-friendly breath and articulation. The musical interest often lies less in harmonic daring than in register and blend: basset-horn writing invites warm chalumeau sonorities, conversational imitation, and gently theatrical shifts between cantabile melody and lightly buzzing accompaniment figures.
Place in the Catalog
However one judges the attribution, K. 439b is best heard alongside Mozart’s authenticated Viennese wind music as a document of the era’s taste for intimate wind ensemble color and compact, performable forms. Its doubtful status has kept it at the margins of Mozart’s “core” canon, yet the pieces remain valuable as a window onto the practical chamber idiom that also nourished his major Viennese achievements for winds.
Spartito
Scarica e stampa lo spartito di 5 Divertimenti in B♭ major (doubtful), K. 439b da Virtual Sheet Music®.
[1] Wikipedia: Mass in C minor, K. 427 — dating and Viennese context for a major 1782–83 work contemporaneous with the presumed K. 439b timeframe.
[2] Digital Mozart Edition (Mozarteum): New Mozart Edition PDF (English) noting that no autograph is known for KV 439b.
[3] Breitkopf (publisher description): performance options and scoring tradition for K. Anh. 229 (439b), including association with three basset horns and common alternatives.