Those used to hearing period instrument ensembles will know that the differences in sound color with modern instruments are not as dramatic with strings and winds as they are with the fortepiano. What they bring to us is a softer-grained string tone, to the point at times of lacking tension and projection, and more vivid and rough-hewn wind tone, especially from natural horn and bassoon (they sound almost kazoo-like here in their little exchange at 12:42 in the first movement). The use of period instrument also tends to go hand-in-hand with a choice of brisker tempos - not systematically, as this is a matter of interpretive choice, and there are plenty of counter-examples in Schubert's Octet itself, but this generalization finds a good example in the present version.
Johann Gottlieb Janitsch (1708-1763) was born in Schweidnitz, Silesia (today Poland). His special inclination towards music led him to undertake a brief period of study in Breslau (today Wroclaw) with the court musicians who were under the employment of the Archbishop of Breslau. In 1733 Janitsch moved to Berlin where the then Crown Prince, Frederick offered him a position as a double bass player. With the permission of the Crown Prince, he founded the circle "Freitagsakademien" (Friday academies), in which music was performed by professional and amateur musicians alike.
A 10 CD Box set with 23 Beautiful Mozart Piano Concertos. Alfred Brendel playing piano. Imogen Cooper also on piano. Accompanied by Academy of St. Martin-In-The-Fields orchestra. Conducted by Neville Marriner. This set is wonderful: Brendel is at the peak of his art, the conductor and the Orchestra are perfect, the sound is clear and old fashionable, very recommended.