Klein, Johann Joseph
- Ellwood Derr
(b Arnstadt, Aug 24, 1740; d Kahla, nr Jena, June 25, 1823). German writer on music and organist. On the title-page of his first published treatise, Versuch eines Lehrbuchs der praktischen Musik (Gera, 1783), he is referred to as a registered attorney to the dukes of Saxony and church organist in Eisenberg, and in 1801 he had been promoted to Hofadvokat and still held the post of organist. His Versuch is a practical treatise on basic musicianship, which discusses musical signs, melody and harmony (both separately and together), tuning, temperament, enharmonicism and continuo. In the foreword he draws attention to the integral relationships of rhetoric and poetry to music, as well as the necessity for composers to know how to arouse and calm passions. Probably the most useful section of the work (pp.232–58) is that on continuo performance in ensemble genres current in the last decades of the 18th century. He prefers the harpsichord for this purpose as it can be more distinctly heard than the fortepiano. Finally, for a more comprehensive treatment of the matter, he refers the reader to the continuo performance section in the second part of C.P.E. Bach's ...