"Overlaying" or mixing audio tracks from two or more sources to perform audio analysis on gunshot acoustics is problematic. Usually the results are artifacts that mislead the listener. In this video I go through several examples both with sonic visualiser and Audacity (you can listen to them) to demonstrate the futility of such efforts. I know, people do this thing quite often, but it does not make a lot of sense, even when great care is given to the process. I outline the pro's the con's and create some compelling audio examples to drive the point home. The audacity portion of this video begins about 20 minutes in.
Corrections:
The sound levels were a little low on the audacity output. You may have to turn the sound up a little and then down again when I am talking.
Also the mouse pointer got "offset" a little during recording the audacity session so it points to the wrong areas.
Let me know if I need to re-record to get the sound/point problems corrected or if it's good enough as is.
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