a German composer and noted keyboard virtuoso. Along with C.P.E. Bach, he represented the Sturm und Drang style of composition. As far as is known, he was the first to use the term fortepiano in a published work, in the title of his Duetto für 2 Clavier, 2 Flügel, oder 2 Fortepiano (1771), which reflects the rising popularity of the instrument at that time. Riga was far from the established musical centers of Europe; but despite this handicap, and the fact that he saw few of his pieces printed, he gained praise from several competent judges for his virtuosity. The English music historian Charles Burney, who mentioned him several times in his writings, held him in high esteem.
