the holes are drilled in at an angle so that the upper register is not overblown and produces an unpleasant sound. whisper keys were also invented to prevent overblowing. the bassoon is known for its reedy sound. its upper register is shrill and sometimes scary. middle register could be used for lullabies because of its majestic and soothing tone. its lower register is deep, dark, and could be used for scary movies and such.