Ok, just read this on the update page about the vox in older films....but there still is an issue with new film viewer crashing. In the past it was due to a wrong terrain issue. I'm still trying to troubleshoot it.
"Switched sound and voice systems to the Miles Sound System. This is a first step in an ongoing update and expansion of the sound system. We’re still using the same sounds at this stage. Please note that voice recordings in older films will no longer play back correctly in the new film viewer. We’re looking at a way to make those work again."