Can You Use Multiple Voices Within an Audio Book?

We've been working for a while on adding multiple narrators to an audio book. It will go down to the word level, so you could have a conversation back and forth between two characters. We expect it to come out some time in the next few months. And we don't think that odo narration can really match the nuances that the human voice can. The human voice is still, by far and away, the superior story teller. Because of significant cos and time to create a traditional audio book, that's why we have seen this large gap between e books and audio books. That gap would continue into the foreseeable future.