there are three sounds recorded, one is the crack as rounds go past, then the actual gun going off, then there are echoes
Posted on 10/08/2017 10:47:02 AM PDT by Paladin2
Audio analysis of Las Vegas Shooting Gunfire
there are three sounds recorded, one is the crack as rounds go past, then the actual gun going off, then there are echoes
There could also be sounds of the occasional round hitting nearby.
Thanks
absolutely, 100%
Later.
Round impacts. Most people don’t know that each round has three sounds each, depending on your position.
- Muzzle sound from the gas bubble behind the round hitting the atmosphere.
- Supersonic crack if the shockwave is near you as the bullet goes by
- Impact thump/whack/bang, depending on what the bullet hits
There are also reflected waves from all of these sounds if they occur near large objects, like buildings.
The audio engineer should examine footage from recent combat in Afghanistan or Iraq.
But later when he is considering an anomaly in the recording, it looks to me like he is unable to identify echoes occuring just a tenth of a second or so after the original sound. There's a whole sequence of gun shots which appear to have such echoes.
The officer whose body cam created some of these recordings may well have "exposed" himself, not to what he thought was the direct line of gunfire, but perhaps to an indirect path for slightly delayed echoes.
No doubt there will be a lot more learned from these recordings.
Thanks. I was looking for a waterfall plot to see if that would help distinguish among all sorts of things (Caliber, full auto vs bump fire vs rotary crank, which window, etc).
“No doubt there will be a lot more learned from these recordings.”
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With the authorities inability or unwillingness (or both) to get to the bottom of the attack, all the video and audio will be scrutinized by audio hobbyists and theorists for a long, long time to come. It’s grassy knoll deja vu time all over again.
Watched about a third. Very deceptive. Hand held cameras are constantly changing their position and angle of microphone to sound. His analysis would only work on a fixed position microphone that is never moved. And he knows he can slow playback speed for better analysis. Maybe he did it later, but not worth watching.
Someone please find out if the performance was being multi-track audio recorded at the time when the shooting started.
Comparing the various tracks in any multi-track audio software, and drilling down to a millisecond display of waveforems, you would be able to tell if the sound of the shot got to a microphone stage right first versus stage left microphone, and be able to tell if the microphone at the front of the stage where the singer was located got the sound later.
There is a video of some smug Mr. Know-it-all ass with bald head wearing glasses who say that the shots were coming from the venue and not the Mandalay Bay hotel. If we can see the multi-track waveforms of the concert recording, I am sure Mr. Know-it-all can be slapped down for his own good.
Back some years ago , I piped the signal from my Garrard Zero-100 turntable to Creative Sounds stereo records on my computer and I was able to tweak the side-to-side adjustment on the pickup shell to find the precise 90 degree tracking angle when I lined up the exact whack of a snare drum on both stereo tracks.
What a joy that was to listen in on perfect tracking.
Just how good are the records themselves for l/r channel phasing?
Those ~100 bursts seem to have a very tight shot to shot period. Likely tough to accomplish with a bump-fire stock.
The FBI and LVMPD talking heads are not sharing much and likely just throwing stories out to see if it quells the waves.
They are not helping their case for competency.
Note:
INVESTOR: Insider Trading and Financial Anomalies Surround Las Vegas Attack Massacre
The Gateway Pundit | 8 October 2017 | Joshua Caplan
http://freerepublic.com/focus/f-news/3593096/posts
“They are not helping their case for competency.”
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A person can only hope, if the FBI et al are truly stumped, that they would be looking at the things the amateur/pro non- government sleuths are going over - audio, video and anything else.
In this case, they have no reason to complain that conspiracy theories are blooming.
“Someone please find out if the performance was being multi-track audio recorded at the time when the shooting started.”
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That’s a good question, was it being professionally recorded on audio or video?
Based on comments in the video regarding the firing rate I calculated about 560 rounds per minute, at least for that one 8 round burst. Wikipedia claims a firing rate for the M16 of 700 to 950. That makes the "bump stock" and incredibly effective device.
I'm sure that Kalifornia, if they haven't already, will outlaw having a spring attached to the butt stock of a rifle. It's certainly more deadly than a three-ounce plastic pistol grip, or a folding stock, or a flash suppressor.
Of course, anybody with a 3-D printer and a spring will be able to make one if they thought it necessary or helpful.
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