The formal procedures for the scientific authentication of audio media in investigative matters and legal proceedings have been updated as a result of the widespread conversion from analog to digital technology since the 1990s.
A protocol is described to improve the voice intelligibility of investigative and other forensic audio recordings collected via digital recording systems, whether audio only or audio/video units.
Authenticity examinations of VHS (video home system) cassettes are commonly performed in forensic laboratories and can usually determine whether a submitted recording is original, continuous, and unaltered. One of the important determinations of this analysis is identifying any portions that have been recorded over
In public talks about audio, one often sees a timeline in which "major changes in the audio industry" are said to occur every 10, 25, or perhaps 50 years. Rather than searching for periodicity in a one- or two-dimensional timeline, in this article it will be more helpful to start out by enumerating some of the multidimensional axes along wchich change occurs