The structure of the opera's plot is complex. Rather than telling a story by starting at A and going through B to C, The Mask of Orpheus explores the Orpheus myth in a number of directions at once, examining the various contradictions which are in the various versions of the myth.
This is done by a very elaborate stage design, whereby the stage is divided into a number of different parts, each part containing its own part of the action. In addition, each of the major characters - Orpheus, Euridice and Aristaeus - appear in three forms: as a singer who represents their human forms; as a mime, representing their heroic selves; and as a puppet, which represents their myths. Also, individual events may occur within the opera on several occasions, as they are being predicted, as they happen, and as they are being remembered.
An example of this process in action is the seduction of Euridice by Aristaeus. When first seen in Act I, this event is shown simultaneously in two different versions: in one, Euridice is raped by Aristaeus before dying, in the other she is not. Later, in Act II, Orpheus remembers this event, but now it is Orpheus, not Aristaeus, who is seducing Euridice before her death.
Because of the complex structure of the work, it is difficult to provide a detailed synopsis. However, the opera's story might be broadly said to be as follows:
Act I - Orpheus and Euridice fall in love and marry. Euridice later dies from a snake bite, and Orpheus consults the Oracle of the Dead with a view to following her to the Underworld.
Act II - Orpheus journeys to the Underworld through seventeen arches, each with a symbolic name. On his journey back, he believes that Euridice is following him, but it is actually Persephone and the mime Euridice. Orpheus sets back for Euridice again, but realises she cannot follow him. Orpheus hangs himself. The act ends with Orpheus waking up, realising that his journey to the Underworld was a dream.
Act III - At the start of this act, time is moving backwards: Orpheus travels back out of and into the Underworld, and Euridice dies once more. Then time moves forwards as Orpheus leaves the Underworld again. One version of Orpheus is then killed by a thunderbold thrown by Zeus, while another is dismembered by the women of Dionysus. Orpheus then becomes the subject of a cult and an oracle. Time flows backwards once more, and Orpheus' death is acted out again, and the opera ends with the Orpheus myth decaying.
There are also six purely electronic interludes which were created by computer manipulation of harp sounds.Synopsis
The music
The Mask of Orpheus, as well as singing and orchestral music, contains a significant amount of electronic music (which was realized on Birtwistle's behalf by Barry Anderson). As well as each act having its own electronic "aura" which goes on continuously, sometimes more prominent, sometimes inaudible, the voice of Apollo is heard on several occasions as an electronic sound "speaking" in an invented language. These sounds were made by Anderson in Paris at IRCAM.