Orpheus and Eurydice died, but Orpheus, protected by the gods, went to Hades and arrived at the infamous Stygian realm, passing by ghosts and souls of people unknown. He also managed to charm Cerberus, the monster known to have three heads. Orpheus presented himself in front of the god of the Underworld Hades (Pluto) and his wife Persephone. Orpheus played his lyre, melting even Hades' heart. Hades told Orpheus that he could take Eurydice with him but under one condition; Eurydice would follow him while walking out to the light from the caves of the Underworld, but he should not look at her
The Mask of Orpheus with the Orpheus myth decaying. "The Mask of Orpheus", in addition to vocal and orchestral music, contains a significant amount of electronic music, (which was precisely composed by Birtwistle, and realized on his behalf by Barry Anderson). Each act has its own electronic "aura", which goes on continuously, sometimes prominently, sometimes inaudibly; the voice of Apollo is heard on several occasions as an electronic sound "speaking" in an invented language. These electronic sounds were made by Anderson in Paris at IRCAM. There are also six purely electronic interludes created by computer manipulation of harp sounds. Jocelyn Herbert was commissioned to