This is the encoding of the first movement of K. 550 according to the Neue Mozart Ausgabe IV/11/9 (ed. H. C. Robbins Landon, 1957; second edition, 1997). The symphony in g minor K. 550 is available in two authentic versions. Mozart altered the original scoring by providing additional clarinet parts while modifying the oboe parts. The first version (without clarinets) and the second version (with clarinets) are both published in full score in NMA IV/11/9. The present digital edition combines these versions in one single encoding. Both versions of the first edition are encoded as 'source_1' and 'source_2', those of the second edition as 'source_3' and 'source_4' with the second edition as the accepted reading. Corrigenda reported in the corresponding Critical Report (H. C. Robbins Landon, 1963) on page i/70-71 and marked as 'source_5' have already been worked into the second edition.

The NMA edition is primarily based on Mozart’s autograph score (NMA siglum A), which is preserved at the Archiv der Gesellschaft der Musikfreunde, Vienna, call number A 159 (XIII 6137). Along with the full score, this item includes two autograph addenda: the first addendum consists in one folio with alternative measures for the 2nd movement; the second addendum contains additional parts for clarinet and revised oboe parts, which constitute the second version. As a secondary source, the editor consulted the first print edition published by André, Offenbach am Main, in 1794 (NMA siglum B) as well as the first print edition of the second version, published likewise by André in 1805 (NMA siglum C). Both of them are not considered in the variant readings of the Critical Report.

In the digital edition, the diacritic markup of editorial interventions used in the NMA print edition (i.e. small size, italics, brackets, dashed line form) are coded as additions; as such they are marked as decisions by the editors of the NMA (@resp). Wherever possible the markup of additions affects the smallest unit that can be individually addressed, usually an element. In some cases, a distinction between supplied and un-supplied elements is made through a <choice> element. With the exception of possible corrections of obvious printing errors (marked in the code as such) the coding of the musical text is faithful to the aforementioned NMA editions. Some normalizations have been applied; for a full description of the editorial principles see the Editorial Guidelines of the DME Music Editions.

The present encoding in MEI 3.0.0 (with some minor customizations) is based on a previous encoding in DOX format. The DOX data were gained from optical music recognition (OMR) and proof reading processes developed and carried out by The Packard Humanities Institute, Los Altos, CA.

For technical reasons, it is possible that some of the original editorial markup not captured by OMR (e.g. small staccato signs) is not represented in the encoded versions.

Lacunae may be reported to the Editorial Office of the DME.

Bibliography Landon, H. C. Robbins. Wolfgang Amadeus Mozart, Neue Ausgabe sämtlicher Werke, Kritische Berichte, Serie IV, Werkgruppe 11, Band 9. Kassel: Bärenreiter, 1963. Mozart, Wolfgang Amadeus. Neue Ausgabe sämtlicher Werke, Serie IV, Werkgruppe 11, Sinfonien, Band 9. Ed. H. C. Robbins Landon. Kassel: Bärenreiter, 1957. Mozart, Wolfgang Amadeus. Neue Ausgabe sämtlicher Werke, Serie IV, Werkgruppe 11, Sinfonien, Band 9. Ed. H. C. Robbins Landon. Zweite, durchgesehene Auflage. Kassel: Bärenreiter, 1997.

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