"drones" . "drone strings" . . . "droneless" . . "droning" . "drone synth note" . "sustained tones" . "Short/High Drones" . "bordun" . . "Drones" . "drone music" . "bourdons" . "bourdon" . "drone pipe" . . . "Drone (music)" . "''bordone'' (drone)" . "drone-like" . "Drone (music)" . "drone basses" . "Pedal/Drone" . "electronic drones" . "drone string" . "static note" . "drone bass" . "drone" . "drone guitar" . . . . "drone bass line" . . . "drone (music)" . "Drone" . "drone rock" . . "dronelike" . . "Droning" . . "drone tone" .