🚀 go-pugleaf

In article <1ii574INNdgp@shelley.u.washington.edu>, whit@carson.u.washington.edu (John Whitmore) writes:
> In article <C0F8Hp.84n@ve7frg.ampr.org> doug@ve7frg.ampr.org (Doug Collinge - VE7GNU) writes:
> >If my CD with a "1 bit DAC" and the aid of "8 times oversampling"
> >can produce audio as good as an older CD with no "oversampling" and
> >a 16-bit DAC then can my circuit with an 8-bit DAC be replaced
> >with a 1-bit DAC and 4-times oversampling?
> 
> 	Welcome to marketing buzzword confusion hour.
> 
> 	A "1-bit DAC" is a sigma-delta D/A converter, and if
> you want to use it for CD output, it has to be 16-bit capable.
> Because, the input to it will be a 16-bit number, more than likely.
> 
> 	There are no CD players that have 'no oversampling';
> perhaps an early multi-kilobuck unit or two with no oversampling
> were produced, but I've never seen one.

Sony did dual 16bit DAC units a few years ago.

> 	An eight-bit DAC is rarely linear to 16-bit precision,
> and will not successfully reproduce CD sound.

But a 8bit DAC linear to 16bits is cheaper to produce than a 16bit DAC (linear
to 16bits) - less silicon.

Kev.
-- 
Kevin Cameron         CLSI,Suite 100,5457 Twin Knolls Rd.,Columbia MD 21045,USA
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