I can convince myself that a lot of the weirdness I hear in many of the different videos is due to echoes, reverberations, bad mics, low quality audio, etc.
But I have a hard time listening to that :03 second burst, the :45 second burst, and that 1:09 burst, and convincing myself that those came from the same general location.
Two different caliber long guns, even if they were 50 feet apart and facing slightly different directions, shouldn’t sound that different.
He filmed himself during the rampage:
http://nypost.com/2017/10/03/las-vegas-gunman-filmed-himself-during-slaughter/
Guess he wanted to make sure he got ‘credit.’
The two shooting windows were on different planes. The room was on the end of a narrow tower. Gun angles were different. You are hearing shots coming more in your direction and then shots going less in your direction. And shots more on the side of a building facing you and shots on a side of a building more facing away from you.