So It's Back To First Principles (Part 2)

[daniel59]

@unhandyandy

the cruiser

According to @offtheback the recording of the police cruiser was manipulated.

@daniel59

@offtheback

My guess as to what happened here: They first cut out all of the “real” shots with slightly different timing. This also cut out the noise. They then added the pristine shot waveform they wanted to use (eight times) at the spacings they wanted. Then they added some noise to mask the process. But the noise wasn’t the same as the real cabin noise. And in some places, they didn’t get it everywhere they needed it. Not easy to see if you are looking at the whole composite signal, so out the door it went.

@offtheback

But the report itself has almost no energy above 2000 Hz while the echo does.

The only physical world explanation that even starts to address this is that the echo is of the bullet sonic signature that bounced off something in front of the shot–I don’t know what that would be, DJ Stewart (joking)? Even he was too far away for that.

But what really happened is the report inexplicably has no high-frequency content. It doesn’t match the echo or the noise spectrum of the rest of the audio.

@offtheback

My explanation for why the police cruiser audio doesn’t converge along with the rest is that it’s fake. The follow-up question as to why it was faked is what I don’t have an explanation for, particularly if there was no second shooter. Maybe “they” had to edit out a section of the video where something happened in front of building 6 that was picked up on the mic, and they had to replace the reports along with a clip of the blank wall. Who knows, this remains a mystery.

Everything else on the audio analysis is solved in my mind.

@offtheback

We don’t know what the cruiser alterations were supposed to achieve.