Related Clues:

• Sound of tires on the highway
• Machine sound
• Make music, in a way
• Sing, in a way
• Electronic noise
• Substitute for forgotten words
• Sing wordlessly
• Participate without the lyrics
• Sound system problem
• Theme, Part 2
• Unpleasant smell
• Rhythmic sound
• Make music on a comb
• Hive sound
• Sing without words