[RDD] Limits of Level Normalization?

Jorge Soto jsoto67 at yahoo.com
Tue Jun 28 13:25:55 EDT 2011

  If I plan to rip to whole cd, I usually just rip one track first and listen to it to decide on the normalization level.

--- On Tue, 6/28/11, Fred Gleason <fredg at paravelsystems.com> wrote:

From: Fred Gleason <fredg at paravelsystems.com>
Subject: Re: [RDD] Limits of Level Normalization?
To: "User discussion about the Rivendell Radio Automation System" <rivendell-dev at lists.rivendellaudio.org>
Date: Tuesday, June 28, 2011, 8:32 AM

On Jun 25, 2011, at 19:33 39, sedwards at xmission.com wrote:

> It seems those early CDs work much better if I tweak them a bit and  
> then import them.  I am guessing that the Normalization in Rivendell  
> can only adjust them so far and not past the point where they clip?

The normalization algorithm is 'peak based', meaning that it uses the absolute loudest sample in a track as the basis for establishing the amount of gain change to apply overall. As such, it is mathematically impossible to wind up with a situation where the normalizer itself will introduce clipping.  Of course, if the original material contained such, normalization will not remove it.


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