“He has very good ideas,” writes Mozart about the excellent Czech oboist, viola da gamba player and composer Josef Fiala (1748–1816) in one of his letters. The compositional heritage of Fiala consists of some 120 pieces, all except one of them instrumental. They include symphonies, concertos and double concertos for various instruments, a number of wind instrument partitas and divertimentos, chamber music pieces for all manner of ensembles, and a total of 17 duets for diverse instruments, including one work only partially preserved. Half of them were published during the composer’s lifetime. Both of the duets for oboe and viola or cello were written in Salzburk between the years 1778–1785. They are revised and introduced by Miloslav Klement. The publication is part of the old Musica Viva Historica series.