‘Frank Martin’s Der Sturm, a setting of Shakespeare’s The Tempest is a revelation. By turns ethereal and richly textured, melodic and atonal, mysterious and literal, it is indeed such stuff as dreams are made on. Why it is not better known? … Robert Holl is a commanding Prospero, his resonant voice laden with authority, wisdom and all the cares of the world. At the end of a long opera his massive central role closes with an extended Epilogue that would test fainter hearts, but Holl never falters’ (Classical Source)