Gian Carlo Menotti

Madame Flora is terrified when she perceives a supernatural presence during one of her fraudulent séances. Menotti's first international success, "The Medium" is a tragedy in two acts for five singers, a dance-mime role, and a chamber opera for thirteen instruments and fourteen players: flute, oboe, clarinet, bassoon, horn, trumpet, percussion, piano (4 hands), and string quintet. The music is dissonant, eerie, and morbid and includes melodies such as 'O, black swan.' (imdb)

In this opera for children, the world has been invaded by strange criatures allergic to music, the Globolinks.