- Voices
- Robert (tenor)
Helene, Robert's wife (soprano)
Aunt Emma (silent role)
The Professor (baritone)
Ambulance Man (bass)
The Maid (spoken role)
Wise Man (tenor)
- Robert (tenor)
- Orchestra (Chamber)
- flute, clarinet (B flat ), alto saxophone (E flat ), bassoon
trumpet (C), trombone, 2 pianos (4-hand, 2-hand)
- flute, clarinet (B flat ), alto saxophone (E flat ), bassoon
- Behind the Scene (On-stage)
- harmonium (or organ)