How can I use an invisible speaker in conversation like on Korriban, when you are talking to Kreia. I need to have holocron's talking without it making Kreia or Atris' lips move.

How can I use an invisible speaker in conversation like on Korriban, when you are talking to Kreia. I need to have holocron's talking without it making Kreia or Atris' lips move.

I'm not sure if this is the way, but you'd have to have the holocron as its own speaker (aka have its own utc) during the dialog, and you'd have to play with the camera settings for the dialog.
If there's an easier way to do it, would someone please state it.