[vox-tech] update on the audio CD problem

[Peter Jay Salzman]

On Fri 27 Jan 06, 12:50 PM, Bill Kendrick <nbs at sonic.net> said:
> On Fri, Jan 27, 2006 at 05:06:09AM -0500, Peter Jay Salzman wrote:
> > Analog extraction is where the the cd is read, the signal goes through a
> > cable between the cd player and sound card, which gets pumped through your
> > speakers.  Point being, a physical connection between the cd drive and sound
> > card is required.
> > 
> > Digital extraction is where the cd is read, and the signal gets pumped
> > through the ATA port to your speakers.  This is more efficient from the
> > CPU's standpoint.
> 
> Woah, I would think this is way LESS efficient.

No.  The CPU is involved in many read-copy operations when the signal passes
through the sound card.

AFAIK, the north and south bridge use DMA during digital extraction.

Pete