On 2008-06-16, Jim Lesurf wrote:
In article , John Phillips
wrote:

I also suspect that with many of the old analogue original recordings the
recorded noise level is enough to dither adequately any transfer onto CD-A
- even if the engineers don't explicitly add in dither or noise shaping whe
doing the ADC. :-)

I have wondered about that and the CD-A timeline.

IIRC Lipschitz and Vanderkooy were publishing about dither in JAES in
about 1984 and just after. Although dither had been know for a long
time I suspect you are right that noise floors for material transferred
to CD were probably sufficient in the early days of CD (1982-ish)
to render external dither unnecessary.

One of my musings was that for a short period after ADCs got better it
may have been that CDs lacking dither but displaying the effects of
quantization noise might have made it onto the market. I have no idea
if this did actually happen, though.

As I say above, NK has form as long as yer arm on this. :-) From comments
I have heard in private, others have also given up trying to explain some
things to him. ...

Well I guess I won't try.

--
John Phillips