Karl Wilhelm Jacob Haas (27 December 1900 – 7 July 1970, London), musician, musicologist and conductor, was born in Karlsruhe, Germany, where he studied at the Classical College, then at the Universities of Munich and Heidelberg. His first work was at the Dumont Theatre in Düsseldorf; then as Music advisor for Karlsruhe and Stuttgart radio stations. He escaped Nazi persecution of Jews and settled in Britain in 1939. He worked as Music Director of Old Vic in Bristol, where he composed incidental music and stage scores.