Wikipedia
Carl Borromäus Neuner, also Karl Neuner (baptized July 29, 1778 in Au (now part of Munich); † April 1, 1830 in Munich), was a German violinist, double bassist, singer, and composer.
Carl Neuner was the fourth child of Martin Neuner and his wife Anna Kottmillerin and was born in the Munich suburb of Au. According to WeGA, the father was a brewer's drayman. Robert Eitner, on the other hand, states that the father was a musician and the first teacher of his son, who then continued his education in Tegernsee and studied with Valesi and Joseph Graz. This corresponds approximately to Lipowsky's account from 1811, according to which Martin Neuner was a student of Franz von Cröner. Carl Neuner was also trained in singing by the court tenor player Walesi [sic] According to Lipowsky, Carl Neuner came to the violin in the seminary of the Benedictine Abbey of Tegernsee. He learned to compose with the court piano master Joseph Gratz [sic] Lipowsky mentions compositions such as Hercules' Death, Venus and Adonis, The Unification of Dance with Musical Art, The Robbers' Den, and Doctor Faust. In his 1961 article for ''Die Musik in Geschichte und Gegenwart'' (Music in History and Present), Anton Würz unites the various statements about his father in the formulation that he was knowledgeable about music, but was a brewer's drayman by profession.
In 1797, he graduated from the (today's) ''Wilhelmsgymnasium'' in Munich. Subsequently, he completed the first year of the two-year basic studies (= philosophy) at the affiliated Lyceum.
In 1800, Neuner became an accessist and ballet repetiteur in the Munich court orchestra. In 1804, he applied for a gratuity for this activity, which he received from 1806. In 1809, he advanced to the position of "real court musician." From about 1814, he acted as double bass player in the orchestra. This job was more highly remunerated; he now had a salary of 800 gulden. Around 1827/28 he retired for health reasons. Neuner died in his father's house on Mariahilfplatz.
Carl Neuner wrote the music for the tragedy ''Der Freyschütze'' by Franz Xaver von Caspar around 1811/13. He also composed numerous ballet scores. Harlekin's Wedding, for example, was premiered with a text by Adam Schlotthauer on May 28, 1811, and remained in the repertoire of the Munich Ballet for several years. His ballet ''Die Zauberhöhle'' was performed for the first time on February 17, 1817.
Carl Neuner is considered the composer of the Christmas carol ''Schlaf wohl, du Himmelsknabe du'', which was published in 1814.
Note: Translated from the German version of Wikipedia into English.