The New Mozart Edition offers researchers a musicologically unimpeachable text based on all the available sources (first and foremost Mozart's autograph manuscripts). At the same time, it also serves as an aid to authentic performances.

The principal Series I to IX, containing Mozart's actual œuvre, appeared between 1956 and 1991. They are regarded as a supreme achievement of Mozart scholarship in our time; modern performances of Mozart's music are unthinkable without them. The important supplementary volumes shed fresh and illuminating light on neglected aspects of Mozart's creative work, such as his activities as a teacher or as an arranger of other composer's works.