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Re: [Libcdio-devel] Spurious corrections from cdparanoia?

From: Blake Jones
Subject: Re: [Libcdio-devel] Spurious corrections from cdparanoia?
Date: Sat, 05 Nov 2011 21:19:25 -0700

> Modern drives don't jitter.  So it is reasonable to turn off jitter
> correction.  I do not recall if you can turn off jitter correction
> with the paranoia library (of course you can do anything with
> programmatic changes.)  I have an uneasy recollection that paranoia
> sometimes makes other types of corrections that are unnecessary,
> although jitter is the most common.

Something else I'll have to try.

>> Do I have it correct that things that are uniformly close to 0000 or
>> ffff are both silence because it what is looked for is lots of
>> *changes* in amplitude. (If this is correct, would any repeated
>> 16-bit value also be silence? For example 5555, 5555, or even 1234
>> 1234?)
> Yes.  I like to think of PCM data with a physical model.  Think of the
> PCM data as air pressure measurements, since what we hear is
> variations in this.

You're right -- my earlier explanation was incorrect.  I've been
experimenting with making WAV files and confirmed this.


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