Re: [Libcdio-help] Best function to read audio CD

[Robert William Fuller]

More comments below.

Rocky Bernstein wrote:
> Comments below.

<snip>

> cdio_read_sector() doesn't try to do any verification or correction of data
> while cdio_paranoia_read() and uses cdio_sector_read() and then tries to
> adjust the data assuming it is an audio sample.
>
> So if what you start out with is a perfect read of data, then
> cdio_paranoia_read() can only mangle this. Another interesting question
> though is whether it mangles it in an audibly noticeable way. For example it
> could replace one kind of silence with another kind.
>
> That cdparanoia is more accurate is interesting and suggests that the port
> to libcdio is not as good as it could be.

Yes, as Rocky suggests, there are problems with the paranoia code in 
libcdio.  I recognized this as well when I was working on cued.  For 
example, if you rip from an image file, such as an NRG file, rather than 
a real CD, you will often find paranoia making corrections for jitter 
and other problems!

Some of paranoia's features probably ought to be disabled on modern 
drives that support accurate stream.  These drives shouldn't suffer from 
things such as jitter.

My stint in grad school seems to be coming to an end, so I might have 
time to look at this in the not so distant future.  I am curious if 
these problems are fixed in a newer version of paranoia.  I have been 
thinking about trying to improve paranoia.

Rob