Are those echoes? Certainly sounds like different distances in the firing.
We’re in the Dealy Plaza Zone if we’re trying to figure that out. Might be audio forensics at this point that could tell us.
Some people have said that, immediately after the burst at the :03 second mark, you can here fire from another gun in the distance. I think that sound is much more likely just the echo of the “close” shots you can hear at :03.
The burst at the :45 second mark sound, to me, to be in a different location than the :03 burst.
That difference is highlighted when you hear the “close” shots again at 1:09.