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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.
Blake