“Clemens Krauss left the Vienna Opera in 1934, and Die Bakchantinnen was not revived in Austria. Egon Wellesz had in any case turned a corner: Die Bakchantinnen would be his last stage work until Incognito, an opera based on William Congreve written for the Oxford Opera Club in 1950 and submitted to a competition run by the Arts Council of Great Britain. After Die Bakchantinnen, Wellesz next turned to a sequence of tone-poems based on Shakespeare’s The Tempest, which he entitled Prosperos Beschwörungen (The Spells of Prospero), a project that subsequently provided Wellesz – living in British exile after the war – with a template for an exploration of that most Austro-German of musical forms, the symphony. All nine of Wellesz’s symphonies were written in the last 25 years of his life, the first of them completed in 1945.”

– from Forbidden Music