Related Clues:

• Singing voices
• Met stars
• Some choir personnel
• Prefix meaning ''height''
• Certain saxophones
• Prefix for meter
• Opera villains, often
• High men and low women
• Pinza and Chaliapin, for two
• Caruso and Carreras
• Chorus voices lower than sopranos
• Some barbershop quartet members
• Choral voices
• Low men at the opera
• Cher and Pat Benatar, for two