A number of physical limitations are inherent to analogue recording media, and for this reason compromises have to be accepted. In order to widen the frequency range of recordings, mechanical, optical, and magnetic recording have used pre-emphasis at recording which is then suppressed again by a complementary de-emphasis at replay. The paper traces the parallel development in all three fields of analog recording.

Author: Brock-Nannestad, George
Affiliation: Preservation Tactics, Gentofte, Denmark
AES Convention: 110 (May 2001) Paper Number: 5360
Publication Date: May 1, 2001
Subject: Signal Processing for Audio

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