vocalizations, also made using an ARP 2600 synthesizer, as are some of the squawks made by the tiny holographic monsters on the Millennium Falcon spacecraft. In Star Wars: Episode III – Revenge of the Sith (2005), Burtt's provided the voice for Lushros Dofine, captain of the Invisible Hand cruiser. The heavy breathing of Darth Vader was created by recording Burtt's own breathing in an old Dacor scuba regulator. Burtt used the voice of an elderly lady that he had met in a photography shop for the voice of E.T. the Extra-Terrestrial. The woman's low pitch was the result of very heavy smoking, specifically Kool cigarettes. Burtt created the "voice" of the title character and many other robots in Pixar's film WALL-E (2008), about a lonely garbage-compacting robot. Additionally, Burtt is responsible for the sound effects in Indiana Jones and the Kingdom of the Crystal Skull (2008). Burtt has a reputation for including a sound effect dubbed "the Wilhelm scream" in many of the movies he has worked on. Taken from a character named "Wilhelm" in the film The Charge at Feather River, the sound can be heard in a large number of films, including in Star Wars Episode IV: A New Hope when a stormtrooper falls into a chasm and in Raiders of the Lost Ark when a Nazi soldier falls off the back of a moving car. One of Burtt's more subtle sound effects is the "audio black hole." In Attack of the Clones, Burtt's use of the audio black hole involved the insertion of a short interval of absolute silence in the audio track, just prior to the detonation of "seismic charges" fired at the escaping Jedi spaceship. The effect of this short (less than one second) of silence is to accentuate the resulting explosion in the mind of the listener. Burtt has recalled the source of this idea as follows: "I think back to where that idea might have come to me...I remember in film school a talk I had with an old retired sound editor who said they used to leave a few frames of silence in the track just before a big explosion. In those days they would 'paint' out the optical sound with ink. Then I thought of the airlock entry sequence in 2001. I guess the seeds were there for me to nourish when it came to the seismic charges." Burtt was among