Possible Clues:

• Husband in bank so taken with Greek character's compositions
• It is written for a small orchestra
• Works for small ensembles
• What's played by a quartet, say
• Maybe quartet notes where bullet goes pop for example
• Works for small orchestra
• Classical works for small ensembles
• What the Emerson Quartet plays
• Works for small instrumentalist groups
• Melodies to be played by small group suitable for a room rather than a theatre