This study investigated whether listeners could discriminate between real-time (RT) and double-speed (DS) digital transfers from analog tape recordings. Signals were recorded to tape at 15 inches per second (ips), then digitized at two copy rates: 15 ips (RT) and 30 ips (DS). The DS transfers were digitally time-stretched and spectrally processed to match the duration and frequency response of the RT transfers. Thirty-one listeners participated in an ABX experiment to discriminate between the RT and DS transfers. Results show discrimination between RT and DS transfers was not statistically significant. Additionally, discrimination did not vary significantly across different types of source signals.

Authors: Lobel, Nick; Tarr, Eric; Bulla, Wesley
Affiliation: Belmont University, Nashville, TN, USA
AES Convention: 139 (October 2015) Paper Number: 9420
Publication Date: October 23, 2015
Subject: Recording and Production

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