Change Ringing is a way of ringing bells that produces a rich cascade of sound.  The bells  do not play hymns or  tunes as do carillons.  Change ringing bells are hung in special frames that allow the bell to swing through an arc of 360 degrees.  A team of people are needed to ring them because each bell requires the full attention of one person. 

Change ringing bells are rung from the mouth up position.  When the rope is pulled, the bell falls, then rises again to the mouth up position.  When the bell reaches that point, the ringer can pull it at the same interval as previously, allow the bell to rest there momentarily, or they can pull it slightly before it reaches the balance.  These subtle controls are the essence of change ringing and what allow the bells to change positions.