Digital Audio Out from CD into SPDIF In on A7N8X ???

  • Thread starter Thread starter Harry Muscle
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H

Harry Muscle

My DVD drive has an digital audio out connection on it (like what some other
CD drivers have ... instead of the four wire analog audio out). However,
there's no specific mention in the A7N8X Deluxe manual on where this would
plug in. Am I correct in guessing that it can be plugged into the SPDIF in
connection, since this is a digital audio in connection?

Thanks,
Harry
 
"Harry Muscle" said:
My DVD drive has an digital audio out connection on it (like what some other
CD drivers have ... instead of the four wire analog audio out). However,
there's no specific mention in the A7N8X Deluxe manual on where this would
plug in. Am I correct in guessing that it can be plugged into the SPDIF in
connection, since this is a digital audio in connection?

Thanks,
Harry
Click to expand...

I cannot say what those two pins are on your DVD drive. Did the drive
come with a manual ? Maybe it says specifically "SPDIF" or the like.

At the A7N8X end, look at the Deluxe manual where it describe the
5 pin SPDIF motherboard connector. Asus suggests that you connect
the SPDIF connector to their adapter bracket. This is important,
because if you look at the adapter bracket, there are four small
components connected to the SPDIF-in signal. One of these is a
termination resistor, to match the 75ohm??? impedance of the line.
A second component is a capacitor, used for AC coupling the low
amplitude signal. The other two resistors are a voltage divider,
and they are used to bias the ALC650 SPDIF input into the linear
region, so it will amplify the low amplitude SPDIF signal to
a full amplitude CMOS signal that can be used by the rest of
the chip. Asus should have put all the crap necessary for the
conversion onto the motherboard, so the adapter wouldn't be
an essential part to making it work.

So far, I haven't read any success stories from anyone doing
SPDIF-in with the ALC650 (chip must be version E or F to work,
and that doesn't seem to be the problem). Until someone with
an ALC650 gets this to work, with some version of an Asus
bracket, I wouldn't waste time or money trying. Sorry...

This post has a picture of what I think is the adapter circuit.
It is possible the J01 connector shown on the Asus adapter is
a place to connect a "digital drive" device. Without a manual
for the adapter or other documentation, all this is
pure conjecture. And without docs, you wouldn't want to
burn out that interface on the DVD, if for example, it
has a 5V output swing.

http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&[email protected]&rnum=2

HTH,
Paul
 
Sorry, don't have access to the original post.

For best results enable Digital Audio (Extraction - DAE) in the drive
properties, and grab this for winamp (if thats what you use):
http://www.url.ru/~copah/CDReader.htm

No cables required. (I tried this on my new board and it works a dream, the
only problem I encountered was with Winamp - the default CD Reader wasn't
working with DAE) It's about 100 time sbetter than an analogue cable that
seems to attract noise from all sources inside the case.

Ben
 
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