Cumberbatch Smaug

Then the sound team worked out a way of wheeling in microphones so they were always equidistant from Cumberbatch's mouth. "Wherever he moved, he had the freedom to be the dragon," Ward continues. "And he was able to deliver this performance during what was a couple of difficult days for him. Peter wanted Smaug to be really frightening so we adjusted our sounds for that."

According to Burge, Smaug's voice is unmistakably Cumberbatch's but has been cleverly disguised. "Dave Farmer actually worked out a method of adjusting the voice subtly and then adding elements behind the voice to burn it into the creature's world," Burge explains. "Once the voice was there, it was put into this enormous reverb to create the size and then he added a couple of layers behind the voice until it was no longer Benedict but this dragon."

Since "Kong," they've provided the actor with the ability to hear the real-time process in their work while recording. Thus, they have really good isolation in the headphones and can hear the result, which gives them the ability to tailor their delivery.

And like the previous cave encounter between Bilbo and Gollum, this one takes place in quiet ambient space for showcasing both Bilbo and Smaug. "You've got a conversation that can happen, and nothing can fight against it, and that was a real gift for us from the filmmakers and from Tolkien," Burge adds. 

Only with much more control since Freeman and Cumberbatch performed separately. "One of the contrasts, we wanted to have was with the treasure movement and what that movement sounded like," Ward says. "Smaug would be sliding through the coins and into the treasure whereas Bilbo's movement of course was much lighter."

Cumberbatch also voiced the villainous Necromancer/Sauron who attacks Ian McKellen's Gandalf. Turns out that the actor has an extraordinary gift that would impress the great Sherlock Holmes: the ability to talk backwards."Benedict has one of the most unique vocal boxes that I've ever come across," Ward admits. "He learned all of the Black Speech [The Dark Tongue of Mordor] forwards and delivered that perfectly and then he would do it backwards and he had the ability of flipping it and then blending it to really mess it up. Once again, he didn't go over the top. It was a performance with a little bit of flavor behind it."

Indeed, as we shall witness, Sauron is an evolving being who grows in strength in "The Hobbit" finale, "There and Back Again" (December 17), taking us full circle back to "The Lord of the Rings."