Related Clues:

• High or low voices
• Voices below sopranos
• Adele and Cher, vocally
• Mercury and Mars, for two
• They sing lower than sopranos
• Some a cappella singers
• Singers sounded out notes
• General senses
• Choir members in cathedral to sing
• Singing voices lower than sopranos
• Gladys Knight and Norah Jones, for two
• Singers: one more than nine, otherwise singular
• Barbershop fixtures
• Opera singers such as Caruso and Bocelli
• Voices between sopranos and tenors