[linux-audio-dev] Paper on dynamic range compression

John Rigg ladev at sound-man.co.uk
Mon Oct 16 17:18:36 UTC 2006


On Sun, Oct 15, 2006 at 12:05:14PM +0100, John Rigg wrote:
> The author refers to some previous work by Mapes-Riordan, who has
> a quick overview of the problem here:
> http://www.omniaaudio.com/tech/dynamics.htm

Oops. The linked-to article is by Frank Foti. Dan Mapes-Riordan's
article "A Worst Case Analysis for Analog-Quality (Alias-Free)
Digital Dynamics Processing" appeared in AES journal Nov 1999. It described
a nice test method using a pair of swept sine waves around 10Hz apart
to give an amplitude modulated signal which exercises the attack and
decay of the compressor under test. As the input fundamental frequencies
approach the upper limit of hearing, they decrease in loudness and the
lower-frequency aliasing artifacts become more audible.

John



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