Related Clues:

• Tyrolean refrain
• Mountain air
• Peak call?
• Sing Dufourspitze-style
• Warble
• Alpine call
• Mountain song
• Echo producer, maybe
• Kin of a Ho-Ho or a Ring Ding
• Alpine sound
• Sing the Alpine way
• High number?
• Peak performance?
• Mountain air?
• Sing Alpine-style