The technique was developed in 1966 by engineers at Abbey Road Studios in London at the request of the Beatles.Īs early as the 1950s, it was discovered that double-tracking the lead vocal in a song gave it a richer, more appealing sound, especially for singers with weak or light voices. The effect is intended to simulate the sound of the natural doubling of voices or instruments achieved by double tracking. It uses tape delay to create a delayed copy of an audio signal which is then combined with the original. ( Learn how and when to remove this template message)Īutomatic double-tracking or artificial double-tracking ( ADT) is an analogue recording technique designed to enhance the sound of voices or instruments during the mixing process. ( October 2015) ( Learn how and when to remove this template message) Statements consisting only of original research should be removed.

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