Karl Kohaut Ed: David Young . DOUBLE BASS & PIANO. Kohaut was a contemporary of Dittersdorf, Vanhal and Hoffmeister. This three movement concerto, published here for the first time (1996), offers musical and technical challenges of Grade 8 standard and above. This book contains pieces currently on exam syllabuses: Double Bass TG: 7 Pieces are approximately Grade: 7 - 8 standard.