Overture in D major (fragment), K. 670
ヴォルフガング・アマデウス・モーツァルト作
Mozart’s Overture in D major (fragment), K. 670, is an unfinished operatic overture sketch from Salzburg in 1776, when the composer was 20. Only a tiny autograph score survives, offering a glimpse of Mozart’s workshop rather than a performable concert piece.
What Is Known
The Köchel-Verzeichnis lists K. 670 as an authentic, extant but uncompleted Ouverture in D from Salzburg, 1776 [1]. The surviving source is Mozart’s autograph and is explicitly labelled “Ouverture per un’opera buffa”; what remains is a short score/score fragment on one leaf (two written pages) (“Partitur: 1 Bl.”) rather than a full set of performing parts or a complete, orchestrated overture [1]. The entry also links the fragment to Mozart’s 1776 sketch material (Skb 1776a) and to its publication in the Neue Mozart-Ausgabe sketch volume [1] [2].
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Musical Content
Because K. 670 survives as a brief operatic overture sketch rather than a completed score, its “music” is best understood as a starting-point for an *opera buffa* curtain-raiser: a D-major beginning that would likely have aimed at brilliance and immediacy, in keeping with Mozart’s Salzburg-period command of Italianate overture rhetoric. The fragment does not preserve enough material to reconstruct a full overture design with confidence, and there is no known complete score or later completion associated with K. 670 [1].
[1] International Mozarteum Foundation, Köchel-Verzeichnis entry for KV 670 (“Ouverture in D”, fragment): status, dating (Salzburg 1776), autograph description and ‘Ouverture per un’opera buffa’ note.
[2] International Mozarteum Foundation, Köchel-Verzeichnis entry for Skb 1776a (sketch sheet), showing K. 670 among the associated 1776 sketch materials and linking to NMA online.