A didgeridoo is usually played sitting down because they are so long. It is played with continuously vibrating lips to make the drone while using a special way of breathing called circular breathing. This means a player breathes in through the nose at the same time as pushing air out of the mouth. A skilled player can refill the air in their lungs. With practice, the player can keep a note playing for as long as desired. There are recordings of modern didgeridoo players playing without stopping for more than 40 minutes; Mark Atkins on "Didgeridoo Concerto" (1994) plays for over 50 minutes continuously.