Braun's main areas of research were German and British music history of the 17th and 18th centuries, especially North and Central German
church music,
opera and
Singspiel,
art song and
music theory of this period. His important research work includes
Britannia abundans (1977), a fundamental study of Anglo-German musical relations at the time of
William Shakespeare,
The change of style of music around 1600 (1982), an analysis of the transition from
Renaissance music to
Baroque music, and
Thöne und Melodeyen, Arien und Canzonetten (2004), a comprehensive treatise on the German art song in the Baroque era. Within the
Neue Handbuch der Musikwissenschaft edited by
Carl Dahlhaus and
Hermann Danuser, Braun wrote the volume on 17th century music (1981), and in the
edited collection Geschichte der Musiktheorie he is author of the volume on the historical development of German music theory from
Sethus Calvisius to Johann Mattheson. Braun wrote (until 2007) 15 monographs, about 140 scientific essays and 38 articles for the new edition of the encyclopedia
Die Musik in Geschichte und Gegenwart (1994-2007). In addition, he published eight editions of sheet music by German composers of the 17th and 18th centuries. From 1987 to 1993 he was founder and director of the publication series
Saarbrücker Studien zur Musikwissenschaft, Neue Folge. On his 65th and 75th birthday, one commemorative publication each was dedicated to him. Braun was a member of the Scientific Advisory Board of the Critical Complete Edition of all works of
Johann Rosenmüller. Braun died in
Saarbrücken at the age of 86. == Work ==