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Journal Article

Attack and Release Time Constants in RMS-Based Feedback Compressors

Authors: Floru, Fred

Journal of the Audio Engineering Society · Volume 47 · Issue 10 · pp. 788–804 · October 1999

Abstract

Mathematical models for feedback and feedforward compresssors are developed. A couple of possible configurations are explored: linear-output rms detector with linearly controlled VCA (linear-domain compressor) and logarithmic-output rms detector with exponentially controlled VCA (log-domain compressor). It is shown that the transfer functions of both configurations are equivalent. A formula for transforming the compression ratio of a log-domain compressor to that of a linear-domain compressor is derived. The difference between feedforward and feedback compressor configurations, with regard to time constants and performance, are considered.

Details

Publication
Journal of the Audio Engineering Society
Volume
47
Issue
10
Pages
788–804
Publication date
October 6, 1999
Affiliation
THAT Corporation, Marlborough, MA (See document for exact affiliation information.)
Type
Journal Article