This is the encoding of the first movement of K. 458 according to the Neue Mozart-Ausgabe VIII/20/1/2 (ed. Ludwig Finscher, 1962; second edition, 2004). The first and second edition, respectively, of NMA VIII/20/1/2 are encoded as 'source_1' and 'source_2', with the second edition as the accepted reading. Addenda and corrigenda reported in the corresponding Critical Report (Ludwig Finscher and Wolf-Dieter Seiffert, 1993) on page b/162-163 and marked as 'source_3' have already been worked into the second edition.

The NMA edition is based on Mozart’s autograph score (NMA siglum A), which is preserved at the British Library, London, call number Add. Ms. 37763. The editor also consulted the first print edition of the parts published by Artaria, Vienna, in 1785 (NMA siglum B1) using the copy that was once part of the Fürstlich Fürstenbergische Hofbibliothek Donaueschingen, now held at the Badische Landesbibliothek Karlsruhe.

In general, the NMA gives precedence to readings from the autograph. Readings from the first print edition, communicated in the NMA print edition through footnotes, are treated in the digital edition as 'addition by the editor' but marked as being based on that source (@reason).

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) is uniquely expressed through the code for additions (<supplied>); 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 Finscher, Ludwig and Wolf-Dieter Seiffert. Wolfgang Amadeus Mozart, Neue Ausgabe sämtlicher Werke, Kritische Berichte, Serie VIII, Werkgruppe 20, Abteilung 1: Streichquartette Band 2. Kassel: Bärenreiter, 1992. Mozart, Wolfgang Amadeus. Neue Ausgabe sämtlicher Werke, Serie VIII, Werkgruppe 20, Abteilung 1: Streichquartette Band 2. Ed. Ludwig Finscher. Kassel: Bärenreiter, 1962. Mozart, Wolfgang Amadeus. Neue Ausgabe sämtlicher Werke, Serie VIII, Werkgruppe 20, Abteilung 1: Streichquartette Band 2. Ed. Ludwig Finscher. Zweite, durchgesehene Auflage. Kassel: Bärenreiter, 2004.

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