[BC] CD vs LP

[RichardBJohnson at comcast.net]

Yes I know and it's wrong. It's often quoted as 20 log10 * 65536 for
65536 codes of a 16-bit number, which is about 96 dB.
I show how it is wrong because it can't possibly be greater
than 20 log10 * 32767  (90 dB) even if you consider the peak
value (incorrectly) as having something to do with dynamic
range.

--
Cheers,
Richard B. Johnson
Read about my book
http://www.LymanSchool.org


 -------------- Original message ----------------------
From: Robert Orban <rorban at earthlink.net>
> At 08:09 AM 9/22/2008, RichardBJohnson at comcast.net wrote:
> >0.707 * 32767 =  23,166 (convert peak level to RMS)
> >20 log10 (23,166) = 87 dB
> >
> >Eighty-seven decibels dynamic range  is much greater than
> >typical analog audio circuitry that almost never exceeds
> >80 dB over a 20 kHz bandwidth, that it should not be the
> >limiting factor in a high-fidelity system.
> 
> Dunn says it is 93.3 dB with flat  (white) TPDF dither in the AES 
> Convention presentation:
> 
> www.nanophon.com/audio/dynrange.pdf
>