Hi Harry
  I'm uncertain about CD players as to whether they do this too but I'm
certain that at least some DVD players do send audio information on the
signal cable.  I never thought the data on CDs was analogue and do
understand that the connector to which this thread refers is at the tail
end of a DAC.  The original poster is,or was, wondering how audio data gets
from his DVD player w/o said connection and it is my contention that it is
handled quite like the way an audio file on a hard drive is handled through
the main data line.
Jimmy
 -------------- Original message ----------------------
From: "Harry Travis" 
> There's some confusion in the last post. All CD's are digital. The issue
> was that for a long time CD roms/writers included the Digital to Audio
> chip and amplifier, just like all CD players do, to provide an analoge
> signal for the next stage. That is what the audio cable was for. The
> jack on the front of the CD rom was fed by that included DA chip and amp
> onboard the CD rom. 
> 
> If that jack is no longer on the front of the player and there's no
> audio out on the back, it is not because the signal is being fed some
> other way. (I think) It is that there is no longer any on-board DA
> processing and amplification being done. 
> 
> said Harry, stirred by:
>      kevinjjcan{at}rogers.com's message of:
>      Saturday 14 Apr 07 at 06:04 PM,
>      On: Re: [OS2HW] Audio
>      [echoed below, in part<=1]
>                       -oOo-
> 
> Hi, I just inserted a CD of the Moody Blues, I assume that is an
> ANALOGUE CD, and low and behold, yes there is audio.
> 
> Nero just advises when disk info is requested that it is a CD. I don't
> know of any other tool to advise more.
> 
> So thanks Jimmy, for the advice.
> 
> KevinJ.
> 
> 
> ----- Original Message ----
> From: "rallee2{at}comcast.net" 
> To: os2hardware{at}yahoogroups.com
> Sent: Saturday, April 14, 2007 4:47:29 PM
> Subject: Re: [OS2HW] Audio
> 
> Just a guess......
> Do you have an HDCP compliant video card? There are new formats such as
> HDCP wherin audio and video are transmitted on the same cable. I can't
> recall offhand if DVI outputs have such capability but I have a GeForce
> 7900GT made by MSi that is fully HDCP compliant and apparently it can,
> with proper connector/cable send both audio and video on the one cable.
> This leads me to believe that modern DVD drives may send both digital
> audio and video to the mainboard on the main cable. In addition my SATA
> optical drive, a Plextor PX-716SA, has *no* audio connector at all on
> the drive! So in this case audio is certainly sent within the normal
> signal lines on the main connecting cable. Hope this helps some at
> least in suggesting what must be occurring since it is certainly not
> wireless and as you said no dedicated audio cable is present. Jimmy
> ------------ -- Original message ------------ --------- -
> From: Kevin Johnson 
> > Hi All,
> > 
> > I'm mystified, which is quite easy to do. I upgraded 'puter with 
> > PCCHIPSp4m800pro, intel 3.2 and included a DVD rw.
> > 
> > This motherboard has AC97 audio. and here's the mystifying part,
I did not 
> use a 
> > audio cable from the DVD to anywhere on the
> > motherboard or it's cards. The point is I can play a movie DVD
with SOUND. 
> How 
> > is this possible???? ????????? ?
> > 
> > The DVD player is straight run of the mill IDE (80 pin cable), with the 
> normal 4 
> > prong power cable.
> > 
> > I did install a Geniatech AS8000 TV card which is HDTV capable and works 
> great, 
> > but it too does not require any audio connection, just fits in a PCI slot.
> > 
> > Any or all clarifications would be appreciated.
> > 
> > Dual posted because I don't know the answer.
> > 
> > Regards
> > 
> > KevinJ.
> > 
> > [Non-text portions of this message have been removed]
> > 
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
> 
> 
> --
> HPT
> -- 
> -----------------------------------------------------------
> travis.dot.harry.trying.gmail.com
> DemostiX
> -----------------------------------------------------------
> 




[Non-text portions of this message have been removed]



 
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