Well, lots of sounds from inside the CM (which was recorded three decades ago) isn't that good as shown in the movie
In the Shadow of the Moon.
You have to remember that
In the Shadow of the Moon is rather edited and cut. It uses real footage but not real sound all along. It's more artistic/cinematic and journalistic work of putting things together to make a cinematic documentary (just have a close look the false TLI scene and sound...). That's why NASA answers rather cautious concerning this movie. I have a few good NASA recordings and unspectacular documentaries on VHS. You can see a lot of inside the space craft and almost all that footage doesn't fit the sound of
In the Shadow of the Moon. The sound and picture of the onboard hand-held cameras isn't that good compared to todays technology. And those cameras were used to capture the docking sequences too...
Nevertheless, we have to get some sound. So it's okay if we use that one of
In the Shadow of the Moon 
I just mentioned that for sure this is also not the real thing, like in "Apollo 13" too
