The Mask of Orpheus is an opera with music by Harrison Birtwistle, electronic music realised by Barry Anderson and a libretto by Peter Zinovieff. It was premiered in London at the English National Opera on 21 May 1986 to great critical acclaim. A recorded version conducted by Andrew Davis and Martyn Brabbins has also received good reviews. A new production of the opera was staged at the English National Opera in 2019, conducted by Martyn Brabbins and James Henshaw. The work is around three hours long.

IRCAM is a French institute dedicated to the research of music and sound, especially in the fields of avant garde and electro-acoustical art music. It is situated next to, and is organisationally linked with, the Centre Pompidou in Paris. The extension of the building was designed by Renzo Piano and Richard Rogers. Much of the institute is located underground, beneath the fountain to the east of the buildings.