| boy soprano | 1.18 | Boy sopranos work better. | ||
| coloratura soprano | 0.39 | His mother, a coloratura soprano at the Cologne Opera, was advised by non-Jewish musical friends to leave. | ||
| mezzo soprano | 0.39 | At the time of his death he lived in Santa Monica with his fiancee, mezzo soprano Zheng Cao, Palmer said. |