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Tuesday, April 16, 2013

Collin County- A tech wizard's analysis of the audio tampering!


I took the Frisco-1.MP4 file that you uploaded to YouTube this morning and stripped out just the audio.

Then I opened my audio editor that shows me the audio in “waveform” format.  Even if you don’t know what that means you have probably watched enough CSI to figure it out.

Anyway, I took the two screen shots you see below of what this file looks like.  The first one is of the entire file.  The second one is ZOOMED in on the 1:20 minute mark (see the bottom of the screen shot).   Any first grade audio student can tell that the audio was erased.  Notice that it is a FLAT LINE.  There is no background noise as in the rest of the file.  Even when I increase the audio (which would also increase the baseline noise) that section does not increase.  The ONLY way you can get this result is by erasure.  Even if they turned the microphone on and off you would see a spike when that happened.



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