Related Clues:

• Off-peak calls?
• Is in peak singing condition?
• Parrots, in a way
• Alpine songs
• Peak performances?
• Sound technicians' worries
• They may be found in long halls
• Some country music effects
• Imitates
• Mountain airs
• Rebounding sounds
• Comes back
• Some sound effects
• Mountain sounds
• Sings at a high level?