Johann Bernhard Logier

Johann Bernhard Logier (9 February 1777 – 27 July 1846) was a German composer, teacher, inventor, and publisher resident in Ireland for much of his life.

He invented the chiroplast, a device to help students learn the piano, and developed one of the first systems for attempting to teach music in groups, which faced heavy opposition at the time.

[3] He also developed his own teaching method, later called the Logierian System of Musical Education, which he published in a series of pamphlets and instruction books beginning with The First Companion to the Royal Patent Chiroplast, or Hand-Director (1815).

[1] This method of teaching multiple students simultaneously was novel because until the early 19th century, both London and most other European capitals had no central institution to provide musical tuition to a number of students, and because it was heavily opposed by musicians who resisted the idea of losing their pupils to a school.

[1] In 1827 Logier published his System of the Science of Music, Harmony, and Practical Composition in both English and German editions (System der Musik-Wissenschaft und der praktischen Composition mit Inbegriff dessen, was gewöhnlich unter dem Ausdrucke General-Bass verstanden wird).

[6][7] Logier's achievements as a composer have always been overshadowed by his successful inventions and educational methods, to the extent that many brief biographies don't mention his compositional activity at all.