An inspiring composition for relaxation and motivation, using violin, viola and cello. I. Allegro moderato, II. Allegro non troppo, III. Lento, IV. Finale. Allegro non troppo, ma con fuoco. String Octet, Op. 12 is a composition in four movements by Hermann Grädener, scored for 4 violins, 2 violas, and 2 cellos. First published in 1881 by Eduard Wedl in Wiener-Neustadt.