- Köchel Number
- K9 626b/22 | K6
- Genre
- Supplement
- Form
- Supplement
Mozart’s Fragment of a duetto (K. 626b/22) is a lost item known only from a brief catalogue listing, with no surviving music, key, date, or provenance. It is generally treated as a work of doubtful authenticity rather than secure Mozart repertory.
What Is Known
The entry Fragment of a duetto (K. 626b/22) is transmitted solely as a catalogued “lost” fragment: no manuscript, copy, or printed musical text is known to survive, and standard reference summaries give no key, scoring, date, or place of composition.[1] As a result, it cannot be connected with any particular period in Wolfgang Amadeus Mozart’s life (1756–1791), nor with a known commission, performance, or circle of singers.
Given the complete absence of source material, modern writers typically regard such items with caution, and this duetto is best approached as doubtful—either a lost work of uncertain attribution, or a title that once circulated under Mozart’s name without verifiable documentation.[1]
Musical Content
Because no music survives for K. 626b/22, the duet’s musical substance—text, vocal ranges, texture, and style—cannot be described responsibly. The title alone suggests a setting for two voices (a duetto), but beyond that, any attempt to place it within Mozart’s vocal development would be speculative.[1]
Sources
[1] Wikipedia — Köchel catalogue table entry listing K. 626b/22 as “Fragment of a duetto” (lost).