Added SPDIF Optical out to MSI A75-G35 and I get no sound

Hello, I connected a TOSLINK cable to my Onkyo receiver in lieu of 2 channel analogue. I know I'm configured correctly on the receiver's end. I set up my realtek HD audio manager to send music via WMP to the receiver using the PC's optical output. The receiver is not recognizing any PCM signals from my PC. I even popped Skyfall in the PC optical drive. It plays the video just fine but the receiver doesn't even pick up the Dolby Digital signal from the movie. I get no sound from the optical output, period.
When I configure audio manager for an analogue signal output through my headphones, all is good. I change the settings to employ the optical output, and nothing happens.
I just want to play music on my home audio system via my PC mobo's add-in optical output. 1st, I had the latest HD audio drivers from the MSI website, which didn't work. Right now, I'm using audio driver version 6.0.1.7083, dated 11/5/2013
Also, I tested the optical cable on my cable receiver box to the onkyo receiver. No problemo.
Any other info about my system hardware or software that you need, just let me know.
Thanks for reading
MSI A75-G35 mobo/ BIOS VERSON 1.7, dated 11/07/2012
Win7 x32 bit
Audio controller hd Audio by realtek
Audio codec is ALC887

LOL No, I modified a toslink header bracket provided for an old DFI mobo. It's a simple 3 wire config(ground, optical out, +5V). Trust me when I say I got it right when I rewired the pinout. I have a red light passing through the end of the cable. The SPDIF header is a $15 option from MSI and shipping cost is $16 and change.

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hey roachmojo,
join the club...i have exactly the same issues as you have...WinXP SP2, Audigy Platinum, Optical In from Sat Recei'ver, Creative Gigaworks 7. analog speakers...
sound skips, stutters, cracks, pops continuously
tried upgrading drivers, but made problem even worse
can't go back to old drivers even with thorough uninstall (registry, driver cleaner pro, manual deletion, etc.)
might be because creative "downgraded" firmware on my card with new drivers
i'm using an Asus A7N8X-E Deluxe M/B with Nvidia Nforce audio onbard (heard there's major issues with this)
any help would be appreciated, otherwise it's time to toss this junk out

MAC Mini and SPDIF Optical Out

I am new to the MAC after 30 years on a PC, so there is a bit on humility involved here! LOL!
I am trying to configure the the sound for SPDIF audio optical out. I see no settings in the Sound Preferences? I only have speakers and HDMI.
Any help would be greatly appreciated!

There are two places you need to visit:
1. System Preferences > Sound
Pick "Built-in Audio" for audio out. This corresponds to the optical toslink output. It is the same option as "internal speakers" if your toslink is not plugged in.
2. Open /Applications/Utilities/Audio MIDI Setup.app and in it configure the build-in audio for the bit depth and sampling frequencies you require. If you are listending to CDs and iTunes music, 16-bit, 44.1 kHz is what you need. If you have higher-resolution music, adjust accordingly.
You can circumvent step 1 by hoding down the option key while clicking the little speaker sound icon in the menu bar (assuming you have it in the menu bar).

What is the SPDIF Optical Out meant for?

I have connected the optical s/pdif out from my Neo2 Platinum to my Panasonic 5.1 Receiver, but I can´t hear anything. The "red light" reaches the receiver, but it can´t decode the signal somehow. I had this with my Audigy 2 card: When I enabled "96khz" my receiver couldn´t read the signal, but when I changed this option to "48khz" it works perfectly. Unfortunately I can´t see this option within the AC97 drivers. So what can I do?
Yesterday I had PowerDVD and Winamp running side by side. I could actually hear the PowerDVD movie, but not the MP3 from Winamp. So it has something to do with the signal from the mainboard. How can I change this?

Quote from: bassmadrigal on 14-July-05, 15:42:01
The spdif out is only capable of relaying dolby encoded sound to the receiver. It is unable to transfer 2 channel..
Um. No.
Per the original question - the optical connector carries the exact same signal as the coaxial digital.
The funny truth is that SPDIF wasn't intended for listening. It was intended for karaoke. They thought they'd make CDs with the lyrics encoded in the less significant bits of the audio stream, and have the karaoke machine strip them out of the bitstream.
But audiophiles started using the SPDIF digital out on their CD players to connect them to audiophile-grade DACs.
Since it wasn't really designed for audio, there's some occasional (mostly insignificant) bit distortion, and the distortion can be made worse by a ground loop introduced by the shield on the coaxial connection.
The optical connection overcomes those issues pretty well. There's no electrical connection and thus no possibility of multiple paths to ground, and the data latches built into the optical transmitter and receiver guarantee that bits are better defined.
Don't pay a lot for optical spdif ("toslink") cables. The only feature worth anything is strain relief on the connector, to keep you from accidentally yanking the fiber out of the connector. The common plastic fiber works just as well as glass on hookups less than about 150 feet in length.
The relivant specifications are IEC60958 and IEC61937. Google for 'em, it's interesting reading.
ANYWAY, as per the specific question.
Pursuant to IEC60958 and AC97 specifications, and restricted by the choice of the ALC850 codec chip, the digital audio connectors on the Neo2 are capable of 48khz 16 bit transmissions.
This includes 48khz 16 bit PCM stereo audio and Dolby Digital compressed audio up to and including 48khz DTS.
Whether or not the windows drivers are capable of the dolby passthrough, i dunno, I've never booted windows on mine. Linux (with ALSA drivers) surely can.
Some audio codec chips are capable of more rates. IEC60958 and it's extensions allow for 32khz, 44.1khz and 96khz in addition to the AC97-mandated 48khz. 18 and 24 bit resolutions are also allowed.
If you intend to build a system for use as a home-theater PC, i highly recommend finding a motherboard with a codec that will at least do 44.1khz. Resampling the audio to 48khz can do horrible things to it. 32khz is only needed for some videos you might download from the internet, some VCDs, etc. You'd already know if you needed 96khz.
Your games are 5.1 but they are not encoding Dolby surround on the fly, so the digital connector is only going to get you 2 channels unless you are watching a DVD or something.
The exception is nForce2 SoundStorm boards, which have an on-the-fly dolby digital encoder.
Dolby is starting to license out their real-time encoder, so it may be possible in the future to buy a piece of software that will push your 6 channel game audio through your digital output.
This is why most surround receivers have a multi-channel input. You're just going to have to get a bunch of cables and run analog.
I also highly recommend that you invest in ground loop isolators.
Since your computer has a three-pronged power plug, it has it's own route to earth ground. Most stereo equipment does not.
When you plug the analog audio output from your computer into your home stereo receiver, in most cases you will hear a 60hz hum on the speakers. This is a harmless (but annoying) tone generated by the multiple paths to ground in your electrical connections.
I've had good experiences with RCA type ground loop isolators intended for car audio use. This has RCA connectors just like your stereo. You'll plug the isolator into the stereo and the computer into the isolator using normal audio cables.
I've had good experiences with Scosche ESO34 ground loop isolators. I've paid about $10/ea for them on ebay. You may pay as much as $15 or $20 for them at car audio specialty stores. Sometimes you can get them cheaper, especially if you're buying more than one of them.
Other RCA type ground isolators probably work just as well. I actually have a box of half a dozen of some other brand that i haven't tried yet, that i paid about $2/ea for.
Some come with brown wires dangling out of them, for earth ground. Personally i wouldn't connect them to anything.
Some of the nicer sound cards - most of the Audigy line for example - has on-card ground isolation, and won't need an outboard isolator. Motherboard audio almost certainly does not have ground isolation.

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If I run the channel test on the Audigy 4 I can get nothing but sound through the left and right speakers, if I run the test on the Audigy 2 (speakers direct connected) the sound is fine, if I reconnect the speakers to my Audigy 4 I get sound on all speakers so it looks like its an issue with the SPDIF and optical inputs (I tried both).
I have emailed tech support, I'm waiting for them to come back and tell me that the Audigy 4 cannot transmit more than two channels down the SPDIF/optical outs, thats my suspicion anyway, if that is the case then I'm not going to be a happy man and the Audigy will be going back to the store. Could be a driver problem of course as I cant believe they would implement Dolby and THX and only transmit two channels on the optical outs, that would be a bit dumb considering the primary use for digital connections is sound system interconnects.
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Just before everyone kicks off, heres a response I got from a tech guy at Creative themselves.
If you connect speakers to your sound card using a digital cable
(RCA/SPDIF or optical) then the software speaker test will only output
from two speakers. The reason for this is that the speaker test signal is
not in AC3 nor DTS format.
The signal on a digital connection is either
Optical SPDIF - which is either Stereo PCM signal or AC-3/DTS Bitstream
RCA SPDIF - which is either Stereo PCM signal or AC-3/DTS Bitstream
If you play AC3 (Dolby Digital) or DTS encoded signals, the amplifier
decodes this and outputs it to all 6 speakers (5 satellites & subwoofer)
discretely.
When playing back stereo signals (such as Wav/CD Audio or MP3/WMA files)
the amplifier may generate 5. output based on the incoming stereo PCM
signal, provided Dolby Pro Logic decoding is available and activated.
Therefore the speaker test should not be relied on when using RCA or
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This applies to all speaker systems equipped with RCA or Optical digital
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This makes sense to me and I'm pretty happy with it, basically as the reply says above the speaker test does not encode to AC3 hence if you hook two Audigys together and run the test you only get 2 channel output, if you play a DVD which is AC3/DTS encoded on one Audigy and listen to speakers hooked up to the other when both Audigys are connected via SPDIF or optical you should in theory get full playback on all speakers. Hopefully
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Simon

Optical Out 5.1 not working

Optical Out 5. not working?Hi everyone.
I have a Sound Blaster X-Fi Xtreme Audio PCI Express card on a windows XP SP3 PC.
I connected the optical OUT to a Sony 5. Home Theather system, DTS and Dolby Digital capable.
When I configure the creative console to output 5. channels, and use the tone or channel tests, I can only hear the front left and front right channels, the others make no sound. My receiver says it's receiving a 2.0 signal, but If I listen to stereo music files or movies, the sound comes out wrong, with low volume and a weird metallic sound. If I set the console to 2., this problem disapears.
Using powerDVD with a 5. DVD, and setting it's options to SPDIF passthrough, the sound it's a perfect 5..
The same happens with Mediaplayer classic using the AC3Filters, and configuring the filter for SPDIF passthrough.
The problem is that the Creative Console doesn't let me choose SPDIF passthrough, I don't have the Digital I/O icon that the help describes and I don't have the mode switcher (it's fixed on Entertainment mode).
What am I doing wrong?
thanks everyone and excuse my broken English.

Re: Optical Out 5. not working
Sorry, I mistook your card for another model. There is no option to select SPDIF passthrough. The Digital Out for this card is always on.
Please note that optical cable will only carry pcm stereo or compressed bit stream AC3, dts. That's the reason you are getting stereo when stereo music files. How many channels you get when playing movies depends on how the movie is encoded too.
I am not sure what is that weird metallic sound, it would be advisable to contact Customer Support to see if they can help you on this.
Sorry, I mistook your card for another model. You are right, there is no option to select SPDIF passthrough. There is no need to, because the Digital Out for this card is always on. Based on your posting, your Home Theater System is already doing the decoding. Please note that optical cable will only carry pcm stereo or compressed bit stream AC3, DTS.
That's the reason you are getting stereo when playing music files. Whether you are getting surround or stereo channels when playing movies depends on how the movie is encoded too. I am not sure about that weird metallic sound, it would be advisable to contact Customer Support to see if they can help you on this.

Is there a difference between SPDIF Optical and Digital Optical

i want to connect my tv's audio output to my home theater
i have a vizio tv, on the back of it, it says SPDIF OPTICAL OUT
and on the back of my panasonic home theater system it says, DIGITAL AUDIO IN, i tried connecting an optical cable and the sounds from my won't still go through the home theater system speakers.
i'm just wondering, is there a difference between SPDIF OPTICAL and DIGITAL OPTICAL?
ports look like the same.
Solved!
Go to Solution.

smileemile wrote:
i want to connect my tv's audio output to my home theater
i have a vizio tv, on the back of it, it says SPDIF OPTICAL OUT
and on the back of my panasonic home theater system it says, DIGITAL AUDIO IN, i tried connecting an optical cable and the sounds from my won't still go through the home theater system speakers.
i'm just wondering, is there a difference between SPDIF OPTICAL and DIGITAL OPTICAL?
ports look like the same.
Nope, two names for the same thing.
You may have to change some settings of either the TV or the Panasonic system to output to the optical port (TV) and input from the optical port (surround receiver).
*disclaimer* I am not now, nor have I ever been, an employee of Best Buy, Geek Squad, nor of any of their affiliate, parent, or subsidiary companies.

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Jpc's guide to digital outputs was great but it didn't seem to address the problems I'm having with my Soundblaster LIVE USB External! I've contacted support on numerous occasions but with no solution...can anybody help me?My Problem:?I have the Soundblaster LIVE USB External Card and I'm trying to play DIVX movies with AC3 soundtracks in VLC media player and also standard DVDs with Dolby Digital 5. soundtracks using both WINDVD and PowerDVD. The Soundblaster is connected to my YAMAHA Home Cinema Recei'ver via the front Optical out (Not the Rear Coax SPDIF) and the amp is set to decode DD or DTS. I have my speaker settings in the Creative Soundblaster software set to Optical Out Only (the little checkbox) and the speakers are then fixed on 2.. In VLC Media player I've selected SPDIF output and I am getting sound but it's just stereo and the Recei'ver is showing that it's receiving a PCM sound signal. In PowerDVD under the config it shows that the Soundblaster is (in use) but under SPDIF is shows (not in use) and I can find no options in Power DVD to select SPDIF! Again I am getting sound but not full-on DD 5.. In WINDVD under sound config is shows options for selecting SPDIF but it's greyed out and unselectable! The only thing that is slected is Analog sound device! I have sound, again stereo!?So that's it really... I'm just trying to figure out why I am getting sound (in stereo only) but nothing that I try will give me full 5.! I understand the concept that ticking the Optical Output only box in the Creative Soundblaster software should then send a pure AC3 signal to the receiver and that should then decode it as it would a DVD from a DVD player! I have tested the front port of my Recei'ver with a set top DVD player and It gives my 5. with no problem!?Any help would be fab!?I'm so at my wits end with this that I'll offer a prize to anyone who can solve this for me!?CheersOlyMessage Edited by olyscott8 on 03-9-200705:48 AM

Thanks for the reply but i'm running Power DVD Delux and even earlier versions of Power DVD had 5. as standard. I think this is not the problem though. I don't want Power DVD to decode the AC3 I want it to pass through the card to my Yamaha Recei'ver and have that decode the AC3 tracks on both Divx and DVDs. So I click the box that says Digital Output Only and it makes no difference!
I did get this to work about a month after buying the card back in September 2006 now it aint working. I've tried every trick in the book from re-install (6 times) to a cleam boot in XP!!!! nothing works! could it be a duff card!
Remember there's a prize for whoever can solve this!
Cheers
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Xtremegamer no output from optical out in Vista 64.

Hello,
I spent over 2 weeks going over those forums and goggling around the problem I have. ?
Ever since I upgraded from Vista x86 to Vista x64 I cannot get the sound out through my digital out (flexijack) connection. I am connecting to Onkyo SR800 ( I don't think Onkyo is causing the problem since it worked before)
Here is what I tried:
. I verified the optical cable and mini-toslink adapter work.
2 I tried latest drivers from Creative site.
3. I tried older drivers ( SBXF_PCDVT_LB_2_5_0004,? SBXF_PCDVT_LB_2_5_0002 ?SBXF_PCDRV_LB_2_5_0006)
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5. I tried changing sampling rate from 48 to 96 Hz in audio console.
6. I readjusted all volume controls in both vista and creative to the maximum.
7 I tried sending test sounds to spdif out.
8. Tried Daniel_K's support packs.
9. Some of the older drivers used to have other tab with Digital I/O checkbox, but that did not help also.
To add some background information:
My onboard audio is disabled and I have no problems outputting sound to my 2 speakers connected to line on the XFI Xtremegamer. In vista x86? I was able to output simultaneously to both my 2 crappy speakers and to my Onkyo receiver (7.). I saw that some people were able to get stereo output through optical out, but I can get a **bleep** squeak out of my onkyo from XFI.
I don't usually post on the boards, because I am able to come across a solution, but this is the first time in my life that I could find a solution. If it wasn't for the price I paid for XFI, I would probably ditched it already and went with onboard Realtek. The problem is that I know XFI sounds better, besides I already spent the money so it's not very useful outside of my computer.

Jmacguire,? thanks for your advice.
It's a very interesting post, I think it should even become a sticky here as it very nicely describes how Vista passes audio to applications.
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Also a funny observation,? when I downloaded an iso image of creative officuial drivers ( from April last year I believe)? I had extra options for digital input/output in speakers tab in control panel and in creative audio console.
It seems weird that creative removed those options from newer drivers.
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Having problem with optical out on HD rental movie

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Audio over HDMI and optical should be active simultaneously.
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AC

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The problem does NOT happen when using the built-in speakers. I've also noticed that if I unplug the cable from the receiver end (leaving it connected at the Mac end) I can see the red LED light shining the optical signal down the cable, but this goes out exactly 30 seconds after audio stops playing. If I start another audio playback within 30 seconds, there is no loss of audio at the beginning, but if I wait longer than 30 seconds (i.e. after the LED has gone out) I encounter the problems with the initial audio being clipped. I therefore suspect that this is an OS issue which is shutting down the digital optical out when audio is not actually playing (presumably to save power or something). I wouldn't have a problem with this if it actually worked properly when audio playback recommences, but it seems that there is a slight delay whilst the optical out service 'wakes up' again and this is leading to the clipped audio.
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I tried to log a support case with Apple in order to have them call me, only to have the system tell me that my support has already expired, despite having purchased the Mac only 4 months ago. It seems that my Apple One-Year Limited Warranty is actually only 90 days when it comes to telephone support. So here I am!
Does anyone else have this problem with optical out, and how can I resolve this? Any help would be gratefully appreciated.
Thank you.

Hello kcore66,
Would it be possible for you to upload one of the files in
question so that I can take a look. In Captivate 1.01 there is an
intermittent problem where sometimes the audio is either cut off or
just doesn't play when you publish / preview. To get around this
simply moving the audio object back and forth along the timeline
and then positioning it back in it's original position works 9
times out of 10.
HTH
Regards,
Mark

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can someone please tell me how to add field FDGRV(Planning group) in the output of TCODES "FBL1n and FBL5n".
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Added SPDIF Optical out to MSI A75-G35 and I get no sound

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