European classical violinist from the 1927 German opera Jonny spielt auf by Ernst Krenek. This titillating slice of modernity was held up by the Nazis as a prime example of "degenerate art."
Daniello, a concert virtuoso, represents the old culture, and title character Jonny, a jazz musician, the new. Jonny steals his violin, in a sort of metaphoric conflict between European classical music and modern American Jazz.
Daniello slips and falls onto the tracks of an oncoming train and dies.
His love interest is opera singer Anita.