He was probably the first composer of eminence who made free use of harmonic color for its own sake.  In this way, he compares well with the most important representatives of the First Viennese School.  In fact, he exerted enormous influence on the North German School of composers, in particular Georg Anton Benda , Bernhard Joachim Hagen , Ernst Wilhelm Wolf , Johann Gottfried Müthel , and Friedrich Wilhelm Rust . His influence was not limited to his contemporaries and extended to Felix Mendelssohn and Carl Maria von Weber . [ citation needed ]
A significant portion of J. C. F. Bach's output was lost in the WWII destruction of the Staatliches Institut für Musikforschung in Berlin , where the scores had been on deposit since 1917. Musicologists Hansdieter Wohlfahrth, who catalogued his works, and Ulrich Leisinger consider Bach a transitional figure in the mold of his half-brother C. P. E. , his brother Johann Christian , the Grauns ( Carl and Johann ), and Georg Philipp Telemann , with some works in the style of the high Baroque , some in a galant idiom, and still others which combine elements of the two, along with traits of the nascent classical style.