Questions tagged [forensics]

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votes
2answers
226 views

A “newspaper in the photo” but for audio? Audible timestamp hash/signature/password/watermark? What (live?) audio channel works as an audio timestamp?

What best practices to prove as evidence that that sound was at that timestamp? Evidentiarily best/wisest is a live stream to timestamp audio? What live audio stream (and is radio/tv news, what about ...
3
votes
3answers
4k views

Forensic-proof voice changer

What is the easiest way to change a voice recording such that the identity of the speaker can't be determined. The transformation has to be non-invertible. For instance, "pitch changing" won't work ...
4
votes
3answers
231 views

Using hum to find edit points - will it work with high quality recordings?

Interesting article on using 'hum' to find edit points in audio recordings. Not sure if this is useful evidence in all contexts but a great way to see how sound has an 'subliminal' presence and effect ...