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Convention Paper

Proposed Equalization for 15 in/s Studio Master Recording on High-Output Low-Noise Tapes

Authors: McKnight, John; Kendall, T.

AES Convention 45 · Paper 920 · May 1973

Abstract

A new equalization and reference fluxivity are proposed; no LF pre-emphasis, reproducing HF equalization +3 dB at 6300 Hz (-25 µs-), and fluxivity of 250 nWb/m. Measured data and a demonstration compare the NAB and proposed performances. Pre-emphasis at 4 kHz is increased from -2 to +1 dB; and at 16 kHz, from +1 to +6.5 dB (NAB was +11 dB in 1950, when developed). Noise and maximum signal at 4 kHz are thus reduced 3 dB (NAB was +11 dB in 1950, when developed). Noise and maximum signal at 4 kHz are thus reduced 3 dB, and at 16 kHz, 5.5 dB. Recording response with less than a total of 0.5 dB ripple up to 20 kHz is achieved with one RC equalizer.

Details

Published in
AES Convention 45
AES Convention
45
Paper number
920
Publication date
May 6, 1973
Affiliation
Scully / Metrotech, Division of Dictaphone, Mountain View, CA (See document for exact affiliation information.)
Type
Convention Paper