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Magneto-Resistive Field Mapping of Analog Audio Tapes for Forensics Imaging

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Magneto-resistive imaging of cassette tapes for forensic analysis applications is presented. Sample tapes were recorded on various tape recorders with events typically encountered in investigations. A comparison of the images with those obtained using ferrofluid is presented, along with comparisons of multiple instances of the same event with the various recorders.

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AES - Audio Engineering Society