Hello I want to inquire about the Audio Recorder In one of the issues found on audio recordings between the accused and the victim but the accused used to change the voice software and then register it and send it to the victim of my question is whether I can analyze and Returns natural sound in an audio recording In order to reach a real sound defendant What is the mechanism of action and tools used in the analysis and criminal investigation process digital audio recordings and Thanks you
Hello I want to inquire about the Audio Recorder
Is that a product? Or … ?
In one of the issues found on audio recordings between the accused and the victim but the accused used to change the voice software and then register it and send it to the victim of my question is whether I can analyze and Returns natural sound in an audio recording In order to reach a real sound defendant What is the mechanism of action and tools used in the analysis and criminal investigation process digital audio recordings and Thanks you
well … basically, you should learn digital signal processing. This will require a certain facility with math. Lots of textbooks out there 'Understanding Digital Signals Processing' by Lyons looks like it may be fairly accessible. However, don't expect magic.
Taking a 'natural recording' and changing it systematically is application of DSP. If you understand that area of knowledge, you understand how that processing may have been done, and if there are any way to undo it.
You can take a plain recording, and just put it through a filter or other processing component. That may removes part of the signal (to make it sound like a voice on a telephone, say), or it may rearrange the signal. In one case, information is lost, and may not be possible to retrieve. In the other … well, it depends.
But you have to start with an idea of what the forward process was in order to reverse it – or to decide that you can't reverse it. That means some ability is coming up with ideas of what processing was made was it done using Audacity or something more advanced? Was it a simple thresholding, or some more complex process?
And all this has to be done with a fairly good sense of possible error sources, or special cases and other things that may cause bumps to appear in your recordings.
That is, you need a lot of experience and a fairly big dollop of expertise.
If you want to get your feet wet, get Audacity or something like it, and play around with different filters to see what happens.
But … I suspect you should hand over this particular analysis to someone who already is familiar with the subject.
thank you