The Klingler Quartet was regarded as the best string quartet of it's times and as the rightful heir to the legendary Joachim Quartet. Karl Klingler, the musician who gave his name to the quartet, had studied with the Brahms friend Joseph Joachim and had joined his teacher's quartet as a young violist. MDG's sleuths have now found two remarkable historical documents in the archives of the Bavarian Radio that show us Klingler as a composer and as an interpreter: his Violin Concerto with Ulf Hoelscher and the Berlin Philharmonic under Volker Schmidt-Gertenbach and the Viola Sonata performed by the composer himself along with Michael Raucheisen at the piano.