We didn’t see a lot of Mikael Persbrandt’s Beorn in the end in The Hobbit: The Desolation of Smaug, and arguably he remained all the more intriguing for it.
Here, Persbrandt chats extensively with AB Svensk Filmindustris about the big skinchanger. A choice quote where he talks about the vocal effects:
When it comes to portraying something that big — he is like, Beorn is, like, three-and-a-half metres long or something. Four metres, maybe. His lungs are like 18 litres [in capacity]. So what they do — they run it through programs I think. I have quite a deep voice myself, but they still they enchanted it a little bit.
Thanks to Ringer Coldsnap for the heads-up!