Techniques and advantages of multi-track (> quarter track) playback heads for forensic analysis of standard monophonic and stereophonic cassette and micro-cassette tape recordings is discussed. The time-domain waveform for recorded signatures can be analyzed in terms of relative timing offset for determining azimuth of the record head used in making a specimen tape. Additionally, excursion of the erase signature into the guard band region is a reliable indicator of an original versus a copied erase signature. Comparative advantages over magnetic development techniques are discussed.

Authors: Begault, Durand R.; Brustad, Brian M.; Stanley, Andrew M.
Affiliation: Charles M. Salter Associates
AES Conference: 26th International Conference: Audio Forensics in the Digital Age (July 2005)
Paper Number: 5-1
Publication Date: July 1, 2005 Import into BibTeX
Subject: Audio Forensics in the Digital Age
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=13253

Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD 26thPapers)   /26/aes26-000030.pdf

Start a discussion about this paper!