This is acoustic processing. The algorithms used need to be vetted. There are always artifacts from source noise, process noise, and echoes. This is only one acoustic sample---at what location relative to the sources? Other samples will be needed to exclude artifacts. In the end, it is a matter of the analyst's opinion, and it is seldom as accurate as a fingerprint. So...wait and see.
Have a listen of the main video of the shooting. You can hear that the sounds of the guns are quite distinct. No echo on second set, sounds like a different weapon.
This is acoustic processing. The algorithms used need to be vetted. There are always artifacts from source noise, process noise, and echoes. This is only one acoustic sample---at what location relative to the sources? Other samples will be needed to exclude artifacts. In the end, it is a matter of the analyst's opinion, and it is seldom as accurate as a fingerprint. So...wait and see.
Have a listen of the main video of the shooting. You can hear that the sounds of the guns are quite distinct. No echo on second set, sounds like a different weapon.
Don't need special algorithms.
I've listened to the two recordings used by one scientific expert. Really hard to make out. It is not something that ears can determine.