Watching the P-G Film is akin to watching an old "Cahrlie Chapman" movie. We get an understanding of what is going on by sight BUT we hear no sound. Not once have I read that the bigfoot made any vocalization in the film either before or after it was filmed and heavily spliced at a later date.
Given the film evidence (and we can all see it clear as day); there are three or more bigfoot present. Some of them "skinned" laying in a bloody pool and "Patty" severely suffering from a gunshot wound to the right thigh. "Verbalization" OR "Vocalization" would have played an important role during these events. I know if I was shot or wounded in that manner I'd be "screaming and moaning" to "high-hell" out of agony and pain. As part of the cover-up; where is that tid-bit of information? Conveniently left out of course for fear of incrimination.
Let me also ask this? Why would one go through the trouble of dragging all of that equipment to one area without documenting "sound" as well? I strongly suspect that type of evidence is among JG and his participants as well. Along with the hundreds of black and white/color photos that he refuses to disclose for the obvious reasons. It would only confirm our suspicions.
I know that that particular camera didn't have audio like contemporary cameras BUT; I can almost guarantee that some types of audio equipment was present during the massacre. Will we ever hear it? Probably not until JG is long turning into dust - if ever. As with the inumerable photos taken during that day or days!