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Discussion Starter · #1 ·
Unlike the ASUS MB not including the SPDIF/Toslink "adapter", my Soyo

Fire Dragon did come with it. But I'm having problems getting it going...


My DVD->Receiver Digital Audio currently uses Toslink (optical). So, I

simply disconnected the optical cable at the DVD end and plugged it

in to the Toslink Out - or at least I tried to. No matter what I tried, I

just couldn't get the optical cable to insert far enough into the plug on

the Adapter.


Anybody else have this problem?


So I next tried the SPDIF (rca) connection. This time, a light on my

Receiver indicating "Error/Overload" lit up. In case it matters, my

Receiver is a Denon AVR-3200.


I've heard it said before that there's SPDIF and then there's "SPDIF" :(

I wouldn't be surprised to hear that the SPDIF OUT on the Soyo "adapter"

puts out a 5V signal while the SPDIF IN on the Receiver expects a 1V

signal.


Sound familiar?


Any help would be appreciated...
 

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Try rotating your optical plug 90 degrees and plugging it in. I have a fire dragon and the optical and SPDIF outputs work. The problem I have with the digital outputs is that activity on the computer seems to cause a lot of glitching of the output signals. I finally disabled the onboard audio and stuck a sound card in to replace it.
 

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What DVD/player are you using?

I have the Soyo Fire Dragon w/CMI8738

W2k/SP2->WinDVD3.1-> S/PDIF passthru DD/DTS


First get the Latest Drivers at CMI8738 drivers


Then be advised C-Media setup menu's for

S/PDIF in/output specify #1 and #2 ports

these relate to #1=Optical and #2=Coaxial

So mark them accordingly


I am using the Coax output -> 25foot RG6 cable w/gold F connectors & F->RCA gold adapters.

Accustic Research Video Cable, but any good RG6 quad shielded cable should do.

Sony STR-DA777ES receiver gets S/PDIF on coax and operates just FINE


Also if you are using ATI's DVDplayer....U won't get DD/DTS

they only pass DD thru their own connector

Although someone here has said they got DD/DTS from 7.6ver player??

But I can't do it


PS.. Some Toslink Optical cables come with little PROTECTORS on Fiber Cable end

......U need to REMOVE the Protector before inserting into Toslink Plug, tried mine fits OK
 

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Discussion Starter · #4 ·
Endymion:


Rotating optical plug 90 degrees was tried. Only one (of the 4

rotations) "goes in" at all - it just doesn't go in all the way. I

can get it in far enough into the SPDIF IN, just not the SPDIF OUT

(which is, of course, what I need to do for connection to the Receiver).


Mouw:


Windows Update also successfully updated the drivers from what came

on the Soyo CD.


The "Audio Rack" (including the "Mixer") app(s) were no different on

the C-Media Driver Download site (I tried both them and what came

on the Soyo CD). The MixerApp->Advanced page simply does not

look like what is described in the Soyo Manual. Where the Manual

says I should be able to select SPDIF OUT #1 or SPDIF OUT #2, the

MixerApp->Advanced page only allows the selection between (5V)

Toslink and (0.5V) Co-ax/RCA on the SPDIF IN :-( [I know 5V doesn't

pass on the optical cable :); the 5V is used to power the optics...]


Sounds like you went with Co-ax to your Sony - is the Sony "tolerant"

of a 5V Co-ax Digital Audio input? Apparently my Denon is not :-(


Thanks for the heads up on ATI's DVDplayer. I was actually using

ZoomPlayer but, as I understand it, ZP uses the actual "back-end"

of whatever DVDplayer S/W is installed/selected - and, in my case,

it is indeed ATI's....


Re the Toslink Optical cables having protectors - I was bit by that

back when I first "went optical"... In fact, I actually "tore" the

protector trying (in vein) to "cram it in" with the protector still installed.

I thought I had just destroyed the expensive cable :)


Thanks for the tips... I still am trying to find a version of the MixerApp

which gives the control (over Toslink/SPDIF) of the SPDIF OUT port.

Apparently both ports are "driven" simultaneously and all you are

selecting is the Voltage level sent to the "adapter". And I can't find a

way to knock it down from 5V to the 0.5V expected by the Denon (and

most other Co-ax Digital Audio gear).


I just can't trust the documentation I have. At one point it claims the

SPDIF IN is "auto sensing", but at others requires one to select between

them. This will come into play when my MyHD card arrives and I attempt

to "pass-thru" (via Co-ax Digital "loopback") the (Co-ax only) Digital Audio

from the MyHD thru the C-Media.


Or will I have better luck breaking down and getting an M-Audio Dio or

Audiophile :-( Some have suggested in the ASUS MB with the same

C-Media that the M-Audio was the way to go for a number of reasons.

Many had difficulty getting the "adapter" (which fortunately was supplied

in-the-box with the Soyo even though ASUS chose to exclude it). But one

poster mentioned the C-Media was very prone to dropouts on his ASUS

and he would recommend ditching it. At only $22 for a PCI card holding

the C-Media and connectors, I guess I shouldn't be surprised that it's

quality is suspect :-(
 

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Discussion Starter · #5 ·
More data on selecting between 5V and 0.5V (#1 and #2) on SPDIF OUT...


I forgot to mention that I was able to get (stereo, not 5.1) to pass thru

the RCA at apparently 0.5V levels on the SPDIF OUT to the Receiver by:


- selecting 2-channel stereo on the Speakers Tab

- selecting Enable SPDIF OUT on the Speakers Tab

- selecting SPDIF IN #2


Note that by selecting SPDIF IN #2, it seemed to have the additional

effect of selecting the SPDIF OUT #2 I had wanted. Maybe that's what

they intend. But it does suggest that I might have a problem if I wanted

to use, say, Toslink IN and Co-ax OUT (or visa versa).


I now suspect that I'm not that far off from achieving 5.1 if, as Mouw

suggested, ATI's DVDplayer is somehow preventing the 5.1 transmission.

I'll try other players/versions...
 
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