His published compositions consist of
preludes,
fugues and
sonatas for the
piano and
organ,
string quartets, etc.; but the greater proportion of his works, vocal and instrumental, exists only in manuscript. They are in the library of the Vienna
Gesellschaft der Musikfreunde. One of his most notable works is his Concerto for Alto Trombone and Orchestra in B Major (1759). As the trombone has few works dating back to the classical period, his concerto is often highlighted by the trombone community. He also wrote a Concerto for the
Mandola, Op. 27, discussed positively in the 1914 book
The Guitar and Mandolin. Possibly the most valuable service he rendered to music was in his theoretical works. In 1790 he published at
Leipzig a treatise on composition, of which a third edition appeared in 1821. A collection of his writings on
harmony, in three volumes, was published under the care of his pupil
Ignaz von Seyfried (1776–1841) in 1826. An English version of this was published by
Novello in 1855. A continuous thread can be traced from his teaching through that of his pupil
Anton Reicha, who went on to become the first Professor of Counterpoint and Fugue at the Paris Conservatoire from 1818 until his death in 1836, and who in turn reached a wide audience through both his own teaching and his theoretical writings, which were standard reference at the Conservatoire for most of the 19th century, and translated into German by
Carl Czerny. ==References==