thanks for the slick driver :) I've enjoied this "simple is the best" driver few weeks until encountered a problem. when I play web radio (www.last.fm) it started to make all sounds include stream, MP3 on my HDD, DivX movies playing back x5 faster than the original speed. let's say, ordinal guy's speech sounds like chipmunks chatting.

this is fixed by re-booting my PC but chipmunks started again and again when I play www.last.fm. I hadn't tested if other stream like Youtube.com causes it.

I'll re-install your driver and check what you need, so please tell what should I do. without that problem, this driver works very well so I missed.

Very good ! Indeed, I tried it this morning and it works with the Trust 514dx!!! Thank you so much dogber1. :)

Thank you Dogber for the excellent driver. I had no end of grief with a Creative X-Fi card in Vista, so I swapped for a Sweex SC003 and now I get perfect S/PDIF passthru in all applications. Great job.

love it buddy thanks

Great piece of software. I use this driver with my old old Terratec Aureon Fun/Windows XP Pro/ and he sound amazingly. No need for Quad and ESL loudspeakers at all. :) Thanks very much dogber1 !! Please tell me, what the option "enable PCM DAC" do? Must be checked?

"enable PCM DAC" enables the digital to analog converter for PCM signals, meaning that you get a signal on the analog ports for PCM streams.

First of all I wanted 2 thank you alot for working on this, Butas usually, there`s ALWAYS a but... ;) the PCM DAC Option doesnt work with all analog streams, e.g. Flight Simulator X, Football Manager 2K8 also System Sounds. I dont really understand why, so i have to connect this crappy Aureon 5.1 that i bought for 16 € via analog AND SPDIF ! Any workarounds for this ?!

spdif is limited to 2 channels (stereo). there are encoding schemes to fit multi-channel sound into the bandwidth that stereo sound takes (e.g. dolby digital or dts), but the driver doesn't support encoding - it can however "passthrough" sound data which is pre-encoded on some media stream (DVD, avi, dvb etc).

yeah, im absolutely fine with digital pcm streams, and it works without any flaws in conjunction with ac3 filter. but my problem is that some ANALOG Streams dont seem to be catched by the driver and redireted to the digital output ( see examples in my 1st post ), i wanted to know if that`s normal or is there something else i need to set up to get all signals redirected to spdif, because connecting the sound card via spdif AND analog is annoying.

you have probably set the speaker configuration in windows to something other than stereo - if that's the case, the kmixer upmixes all the stereo sources to multi-channel audio and that disables the SPDIF port.

nah, thats not the problem. in kmixer everything is set to stereo. maybe it is because the cmd has no WT integrated in XP. maybe thats why i cant get some analog signals snatched by your little lovely thingy. i`m stuck...for now i have to keep my remote with me and when nothing happens on spdif i´ve got to change to analog input :( anyways, thnx for your help buddy

At former times, I used 2-channel audio and active subwoofer. I listened to the music and movie with 2.1-channel(not 2-channel). Movie was played via downmix, music was played with bass redirection(foobar2000 channel-mixer component)

In these latter days, I knew the being of this great 8738 driver and bought DAC too. But this driver(in fact 8738 soundcard) cannot operate subwoofer in spdif mode. Can you do spdif and 5.1channel to operate at the same time? If impossible, do you have any idea for my state of problem?

Sorry for my poor English. And thanks for this wonderful driver.

Hey Dogbert - this rules!

To get 5.1 working in VLC, you should add to your FAQ that they can switch to the Win32 Sound out API. It works and my receiver now sees 5.1: http://forum.videolan.org/viewtopic.php?f=14&t=30547&st=0&sk=t&sd=a&start=30

See the post from t-readyrock: "Changing my output module to win32 waveout extension, however, did the trick (preferences > audio > output modules > enable advanced)"

year98, ac3filter and ffdshow have a built in DD encoder - with the help of these, you can upmix stereo sources to multi-channel audio. mike, thanks for heads up - the FAQ has been updated.

excellent lightweight driver. thank you very much for your time and efforts!

Thank you very much for this! :)

Hey dogber1, thanks so much for creating these drivers! Playback on my HTPC used to have sound drops ever 5-10 minutes which was driving my insane (whenever a Dolby Digital or DTS soundtrack was present). Updates to drivers and software that came with my Dynex soundcard did nothing to resolve the problem, and I've been fiddling with SPDiffer and AC3Filter to no end!

These drivers have made my HTPC practically perfect now :D

whoa dude, i just found this thread by total accident and im about to install this driver.. i've been looking for the DTS/AC3 multichannel playback option for this chipset for YEARS!!! my old nightingale soundcard will benefit a lot from it i hope.. you should really make some promotion for this supercool driver !!!

mfg tstargermany

before i forget.. i got a nightinggale, and unfortunately the driver only installs 1 audio device and simultaneous record+playback doesnt work..could you add an option to install 2 audio devices for in/output ?

sure it does (the XP wizard claims otherwise, but this is wrong)

6/5/2008 Today I'm having a problem forwhich i think you'll have the answer. I'm hearing audio playback at about 1/2 speed on some mp3 and audio from some wmv or avi video files played with VLC. The video is at full speed.

When I searched I found advice to 'upgrade audio / hardware drivers'.

I'd like to be sure that I understand what to do.

If I am to remove your drivers then is this the right method?

I'm in 'Add/Remove' programs. I should remove your drivers there and then what do you suggest?

If you're too very busy to direct me then please send me to a wiki or page with instructions. I would be glad to update a forum with my problem and your solution. <== Just let me know which location(s).

This driver works GREAT!! Initially I thought my card was defective or something, then somehow managed to find this. Many thanks!

I'm using a Turtle Beach Montego DDL in Vista 32-bit, and I can't seem to get sound through the center and sub channels using 5.1 surround speakers (Logitech X-540s)through analog. Is there anything you could suggest I try?

very good driver now all that it needs is the ability to use each jack as a seperate output on Montego ddl.

This is beautiful!

Thanks for all the work you put in this project.

Cheers, David

This driver works great, I love the playback on 16bit/44KHz.

hey dogber:) you should start creating this UNLOCK driver for the realtek chipsets as well and charge some money for it, like 1,99$.. people would rip it out of your hands..

Awesome dogber1, thought I might have to scrap my soundcard when I switched to Vista 64, but thanks to your driver I'm up and running again with optical audio out

Man, you are a genious. It works like a charm. I´ve been searching for a XP driver like this for my "MD-MATE PCI" for years (the card works perfect in linux). Greetings from Argentina,

Hernán

Thanks a lot, this drivers rocks ! I have a CMI8768+ and it sound better a lot ( Trust SC-7600 ).

I wish to know if it possible to monitor spdif in to listen my xbox 360 ( in stereo of course ), its the only thing that the driver lack for be perfect to me.

Thanks and sorry for my bad english.

this worked like a charm, i have been playing around trying to get this trust sound card to output AC3 for over a week and these drivers worked like a charm.

Hello Dogber1, first of all I would like to say thanks very much for the C-Media 8738 driver, it's the only one that made my sound card work with Far Cry 2!I was about to throw my copy of the game out of the window, until I stumbled upon your website...I have a Terratec Aureon 5.1 Fun under Win XP SP3, and with the latest official Terratec drivers installed, each time I run the game I could get as far as the first loading level screen. Then my PC would crash and reboot.This happened every time, and is the only game that did that. I suspected it to be an audio problem, because I 've heard that Far Cry 2 is very picky about sound drivers, and I knew it wasn't my hardware's fault, because it's all high-end. I don't OC, and my temps were all perfect. Before finding your drivers, the only way to run the game was to turn sound acceleration all the way down to one step above the "off" position. (if I put it to the off position, the voices in the game got distorted, so it was a no-go.) However, with your drivers, the game works perfectly with the audio acceleration fully enabled, the surround sound in-game is incredible, MUCH better than the official driver (and I only have the Creative Inspire T6100 5.1 analogue crappy speakers!) and also, i 've been playing for a week now, and the game has never crashed since. Once again, thank you very much, and pardon me if I dragged this on a bit, just wanted to help in case someone had the same problem.

Hi dogbert! I was stilled stunned by the fact that I had just bought a '5.1 audio card' that only plays stereo over s/pdif when I found your driver. You know, it is people like you who make me feel guilty that I don't use my programming for the good of the community more often! Thanks a lot, because I'm currently listening to an AC3 file in 5.1 on my surround set!!!

Great driver! Saved me as its the only one the correctly functions on Vista.

However! A large issue:

- When using the driver in conjunction with Traktor DJ Studio and the ASIO4All Driver, after a certain time (say a couple of minutes), the audio will gradually distort and after a minute become a loud buzz.

Is this an issue with this driver or the ASIO driver? When not used together with Traktor and the ASIO driver, the sound is great.

Thanks!

Fantastic, been banging my head against a wall trying to get my Theatron DD to provide DD and DTS in vista media center. Installed and worked perfectly ... many, many thanks!

Hey Dogbert, I would like to thank you a thousand time for your drivers. I bought this 8738 audio card and official drivers kept me crashing in almost all direct3d applications on my vista sp1 os. Now thanks to you everything working properly, with full 3d sound!

Super, merci beaucoup pour votre travail. Sans vous j'étais dans une galère sans fin sur mon HTPC.

Before , Thanjks for this nice Driver;

One Question?

I did all to passtrough DTS and Dolby , But when i play a DTS or Dolby movie my receiver always says PCM 44.1 Do the reveicer plays DTS or is it only pcm?? The receiver is : Sony sTr-dg5200 In playback options from my spdif i checked thats its default.

tantatium, this is probably due to some misconfiguration. Please drop me an email with your system specs.

dogbert, indeed , My AC3 filter wasnt SPDIF activated. Sorry to bother :D

Does anyone know if this supports Windows 2003?

Driver Works only when i Load it with No driver Signement in Vista x64 startup

Followed your Procedure to Always enable thet signature. But still need to startup with No driver sgnement

therealclaymen, it will probably work. I haven't bothered installing Win2k3 and testing it, but since it is working on XP, Vista and 7, chances are good.

tantatium, that's why the 64 bit versions of Vista and 7 remain unsupported.

Thx very much!

(Disabled driversignature and it works fine!)

Works nice on VISTA 64bit with TheK&MPlayer, 32bit mplayerclassic, 64bitmplayerclassic ....

Good work

Greetings from Germany

Hi. Very nice driver. There is a related product that uses the same chips but connects over ethernet/wifi. For example Linksys music bridge. Unfortunately the driver sends everything at 48KHz.

Hello dogber, tnx very much for this slim and sleek driver. I have been trying to get my expensive Audigy to give good AC3 throughput via its S/PIF for month and could get it to work. I really hate those bloated drivers. Finally I bought a second hand TRUST SC-5200 and it immediately worked to perfection. Great Stuff

Just bought an Trust SC-5250 and installed it into my Compaq D330 DT with Vista MCE.

Vista doesn't recognizes the card by default, that is nice because i don't have to remove the default drivers.

Installed the drivers (the version without WaveRT, don't know what WaveRT is)

And it works great!

My receiver indicates that the card is using all the channels, so i have 5.1 sound with every application, even with DivX/XviD

I also tried an DVD (Tiesto In Concert) and it also worked fine, the receiver indicated "Dolby Digital"

Thank you very much for this driver!!!!

ich bin besitzer einer "Theatron-Agrippa-DTS 7.1". die werkseigenen treiber funktionieren wenn überhaupt bescheiden. zum zweiten mal habe ich über 1 std. mit der installation verbracht, ohne erfolg. dann habe ich dieses projekt gefunden! treiber installiert....fertig!

ich bin begeistert, so einfach und so großartig kann es sein !!

danke! danke! danke! für diese hervorragende arbeit!

Awesome drivers :)

Using them to passthrough from Xbox and movies to X-tatic digital

One tiny request... TRAY ICON option for control panel...pretty please :)

I need to change passthrough loop on and of every time i fire up my xbox ;)

there are command line options for cmicontrol.exe with which you can enable / disable that feature. with that, you can easily write a small script which does that.

Sign and install the cmediadrivers using TESTSIGNING

try at your own risk

#1. Install Microsoft Windows SDK==

Download and install the Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 SP1: RC. The easiest way is to use winsdk_web.exe, only install the tools, the samples and documentation is not needed.

#2. Create cert.bat

"C:\Program Files\Microsoft SDKs\Windows\v7.0\Bin\Makecert" -r -pe -ss cmediadrivers -sr "LocalMachine" -n "CN=cmediadrivers" cmediadrivers.cer
"C:\Program Files\Microsoft SDKs\Windows\v7.0\Bin\CertMgr" /add cmediadrivers.cer /s /r localMachine root
"C:\Program Files\Microsoft SDKs\Windows\v7.0\Bin\CertMgr" /add cmediadrivers.cer /s /r localMachine trustedpublisher

#3. Create sign.bat

"C:\Program Files\Microsoft SDKs\Windows\v7.0\Bin\signtool" sign /v /a /s cmediadrivers /n cmediadrivers /t http://timestamp.verisign.com/scripts/timestamp.dll "C:\Windows\System32\CMICONTROL.exe"
"C:\Program Files\Microsoft SDKs\Windows\v7.0\Bin\signtool" sign /v /a /s cmediadrivers /n cmediadrivers /t http://timestamp.verisign.com/scripts/timestamp.dll "C:\Windows\System32\cmicpl.cpl"
"C:\Program Files\Microsoft SDKs\Windows\v7.0\Bin\signtool" sign /v /a /s cmediadrivers /n cmediadrivers /t http://timestamp.verisign.com/scripts/timestamp.dll "C:\Windows\System32\drivers\cmipci.sys"

"C:\Program Files\Microsoft SDKs\Windows\v7.0\Bin\signtool" verify "C:\Windows\System32\CMICONTROL.exe"
"C:\Program Files\Microsoft SDKs\Windows\v7.0\Bin\signtool" verify "C:\Windows\System32\cmicpl.cpl"
"C:\Program Files\Microsoft SDKs\Windows\v7.0\Bin\signtool" verify "C:\Windows\System32\drivers\cmipci.sys"

#4 Install and sign the driver

Active TESTSIGNING and reboot (bcdedit.exe /set TESTSIGNING ON) Install the driver as usual Run cert.bat (only do this once, or you might have to remove duplicate certificates from the certificates store) Run sign.bat

This works on my windows 7 rc (7100) install.

I have a question to you Dogber1: can that be done, to route the mic-in to another jack on the card? because i'm using a headphones/w mic, and the jack plug of the headphones is quite thick, and it is pushing the mic to aside when it's plugged in (the mic jack is next to the headphones jack), so it would be good if it would be possible to route the mic jack to some sorround jack which is out of use at least in my computer

thanks

No, the mic line is unfortunately hardwired.

i've found that the exchange front/rear jacks option would do for me for this matter, but it seems not to work :( am I doing something wrong? I just check the option 'Exchange Front/Rear Jacks', and would like to hear the pc playing from the rear out jack, but no sound, but if i use the front jack and play something, and check this exchange option the front out gets mute, and i get the sound back if i remove the check from the option...

how to get 5.1 output while playing stereo???

gaszi..., that's just a register switch described in the c-media specifications I've implemented. Whether a vendor actually makes use of it in their designs is another question.

13.mario.p.13, I've updated the FAQ.

thx

thanks anyway, I have an other question too, is that technically possible to have both recording and playback controls in the windows mixer? Because it would be a good idea, although i've found out that if I start "sndvol32 /record" I get the recording controls(I've placed a shortcut for it on my desktop), but in its normal way I have to click on mixer and you know... a lots of clicking... I don't know whether if it is possible, how complicated would it be to be done, so it's not a nagging on you for doing it, just an idea

sndvol32 is just an application - you can easily write your own mixer - there are no technical restrictions to have both recording and playback controls in the same window.

Dogber1..., Can you tell me which file is it in your driver where the mixer is set up? Or is this not this simple? Because I may tweak the code, I'm just getting familiar with C language, but i've been using Pascal,Deplhi, so maybe I could tweak it sooner or later.

Another thing: I've found an interesting thing with your driver: A good new option would be a new switch either in sound mixer, or in the Control panel app: SPDIF monitor, with which you could hear what's coming from the spdif in through a speaker plugged in the line out... It is either working right now too. I just have to restart windows while a sound is being played through spdif in( right now it's my desktop cd player), and I can hear it through my headphones, until i start the CMI control panel. but on next reboot, i can hear it again too

A rather interesting thing (with the spdif in is still disabled in the cmi control panel), I can record the signal coming from the spdif in AND WHAT I'M TELLING THROUGH MIC IN!!!, with windows sound recorder, the spdif signal is sounding at a smaller volume, but i can hear both my voice and the sound played from the cd!!, but if I have the spdif in recording Enabled in cmi control panel, i can only record the cd player, but it is still 'Monitored' so i can hear it in the headphones whilst recording

What do you think?

you don't have to modify the drivers for writing your own mixer frontend - that's doable with just basic Win32 APIs.

As for the spdif monitor, I haven't got the time at the moment to implement it. The driver is open source, so if you really want it, you can implement it - I'll gladly accept a well-written patch.

This discussion is exceeding the purpose of this page - I think I'll clean up a few comments later this week.

I'm considering to develop the spdif monitor function, what tools do you use? I've seen in other error reports that you mention the DebugView?? to see what's happaning in the kernel, and in what C enviroment do you develop?

For the mixer it would be too complicated to have an external program, because i only need basic functions that the sndvol32 already provide, I don't need separate volume for each channel etc... So the "sndvol32 /record" shortcut is nearly perfect for me, but it would be better to have the recording controls in the window that windows already provides, with 'no' memory use, when the mixer is not opened...

For kernel development, you need the WinDDK. There's also a kernel debugger for Windows - however, you need a second machine for it. The MSDN contains extensive documentation.

Memory use isn't a concern anymore in these days.

Two surely silly questions... :)

I'm using Vista 32bit with standard drivers... What could I gain if I upgrade to Wave-RT drivers?

Is it possible to route line-in to spdif-out? If not... any soft to record&play in "real time"?

pequesan, the WaveRT driver has a lower latency WASAPI interface whereas the non-WaveRT version has a kernel streaming interface. Performance-wise, they're almost identical. It really depends whether the player software you are using supports one or the other.

The line-in is routed to the spdif-out if the card is uninitalized, e.g. with no driver installed. With a few hundred microseconds lag, you can achieve this by using the monitor function of some recording software, e.g. audacity.

MMMmmm... what is the "monitor function"? I'm connecting an old VHS videotape recorder to my PC to see and record old tapes. No problem recording audio using line-in and these drivers, but I would like to hear it at the same time...

Thanks for the above answers!

pequesan, either use the analog outputs or do this

hey dogber1,

very nice work indeed. is it possible for you to make an asio driver? is that a lot of work?

Trommler!

You may not need an exact asio driver for this card, because there is an 'universal' driver called ASIO4ALL, which is working along with this card too. I have not used any special applications what needed especially asio for any matter, but i've heard that using asio lowers the latency of the card, in my setup using asio4all and testing the card in loopback test with rmaa, it shows 1ms latency! try it out

I have to add that asio4all is of course a supplementary asio driver, it needs a wdm driver (i.e. Dogber cmedia :) ) installed for the same card

Hello Dogber, I have been using your driver since February 09 without the slightest hitvh (thus I have not updated to a later release since then). But during the last days I have encountered the following problem during MKV playback with non AC3 sound stream (my tuner indicates a PCM stream). Originally there might have been 5.1 sound and I can still hear everything- but the speech elements of the stream are almost inaudible compared to the noise elements such wind, music. Is this an encoding or a decoding problem ??

that's a "problem" of the encoding. the voices are usually played with the center speaker, and it's probably too small and silent in your setup.

Hello Dogber, yep that's sounds logic to me - I will try that!

Thank you :)

I haven't gotten my old cmi8738 (Soyo PX400 Dragon onboard chip) to work with windows 7 yet. This driver at least recognizes the correct PCI bus ID for the chip. So we are on the right track. Soyo is out of business so there will not be a driver release from them.

I skipped the Vista releases and just learned about driver signing... wow I'm no lawyer but how can this not be squeezing out the competition? I have that tool to "enable testing" and driver signing but no luck yet, using F8 to disable the driving verification on boot has not worked either.

If anybody has a solution to this please let me know.

Firstly, thank you heaps for this amazing piece of software, it's been most useful. Bit-perfect rocks.

However, I'd like to make a feature suggestion: support for native sample rates lower than 44khz. I'm very happy with the new extra sample rates that I didn't even know were possible with this hardware. Problem is, since I'm basically a retro musician, being able to monitor sounds in there original low sample rates without the interference of hardware upsampling is essential, so right now the only way to get around that consists in transferring the recorded samples to an much older machine with an ancient soundblaster card capable of outputting at 8khz, 11khz and 22khz.

Do you think you could manage that? I understand this is more of an SPDIF-focused project, but I had to ask, who knows, miracles happen sometimes :)

I instaled driver cmi8738/8768,and it write work ok,but on my optical cable led is turning on only in situation when i set the stereo speakers,and that was happend with my original driver too.

matt, please refer to the bug tracker - there is a description on how to work around this

leila, the interface is unfortunately limited to frequencies above 32 kHz afaik. iirc, the chip can't do 32 kHz so the lowest supported frequency is 44.1 kHz.

snjezana.skof81, rtfm and stop posting names of illegal stuff on my website.

Hello Dogber, thnx again for this phantastic driver. All files sound really great except some 5.1 multi channel Hi-DeF WMV files where the mix sounds very strange (strong music and noise but very weak languange). Is there a way to edit that in a way without fudginng the pass-through quality ??

You guys ROCK!!! After installing your driver into my Homemade HTPC (Vista Premium) I went into TOTAL MEDIA THEATER Ultimate and shanged the Audio to S/PDIF out. I'm using the Riviera Card from Turtle Beach, WOW! Transformers revenge of the fallen blasts. In the Control Panel the sound option select you device. Don't be fooled like I was, it shows that only 2 Channel Audio is available but it's porting the digital data over the TOSLINK to my Audio Amplifier. Man, the sub just came alive and the seperation between the channels is perfect, nothing is muddled, very very theater like experience. Dang, now I want 7.1.

Thanks again!!!!!!!

PlanoColt?

bernd, that's more or less the way it has been authored and you can't change it without decoding, processing and re-encoding.

Bought a Sweex SC012 today and added a SPDIF out jack to it. Got it up and running in no time. Thank you so much!

Thank you dogber1 for the driver. You have allowed me to have a excellent source for under £15. Together with cmp + foobar + KS it sounds amazingly amazing.

Thank you very much. Just move my HTPC from Vista/XBMC Babylon to Seven/XBMC Camelot and i had some trouble with my Terratec Aureon 5.1 PCI sound card... until i found your driver ! You're a genius !

An addition to cmedia hardware: it contains a non-oversampling dac, such dacs are quite frequent topics on audio forums that they sound better than oversampling ones. A non-os dac reconstructs the digitalized signal , so the output is made out of voltage steps(I've seen it on the oscilloscope and realized from a youtube video that this is a non-os dac), and it does not try to mangle with the signal to restore some continous wave ie. a sine wave...

i just bought the 8738 has a cheap solution to enable 5.1 surround and the drivers on the cd were doing nothing for me. i went to the website and the solutions that windows vista had but nothing was working. i googled it and ended up here, where you've got a perfect solution!

thanks a lot!

Hello again. This may sound even more pointless than my previous request but would you ever consider adding OPL support? turns out many of these CMI8738 sound cards can indeed do OPL in hardware but said capability is disabled in the official 2k drivers. I've gotten it up and running perfectly in DOS, but it would be much more practical to access this nice synth directly from XP.

Anyways, thank you very much again for your work, gotta love the low-latencies, it's a dream for virtual instruments + midi interface, gives asio4all a run for it's money :)

Love the effort, but I am missing a key thing on my Windows 7 install with this driver. An Equalizer. My Logitech 2.1 system's bass doesn't have a volume control, and I can't control it with this software!

I think I need to take the plunge and learn something substantial about audio programming and try to help out with this problem. Anyone know where to get started?

I have a question if you don't mind answering. I have just bought a Terratec Aureon 5.1 PCI Internal Surround Sound Card and am plannning on using it for my PC and PS3 gaming. The question is will I be able to connect to PS3 to the card using SPDIF-In and hear the sound from my console in 5.1 if I set the output mode of my PS3 to DTS 5.1, thanks in advance.

leilaschuller, the OPL is somewhat a piece of outdated hardware - there are much more capable software synths readily available.

rankftw, possible if you know your way around directshow filters, but due to software issues, expect >32ms latency.

The SPDIF Sound in XBMC is now working like a dream. YOU R THE MAN DOGBER1 :)

I have tried to find a solution for days, but nothing worked. I have a pci card (TRUST 5.1 Surround card with a separate SPDIF in and out mounted) it has a C-Media 8738 chip on it.

It only worked with 2 channel stereo sound, trough SPDIF to my old DVD player / Combo surround 5.1 system Philips LX3900SA.

And when I installed XBMC on my windows XP PRO 32bit system, on a Pentium E5300 dual core 2,60 GHz and 2 GB ram. only analog sound in XBMC worked :(

But then I found your page... So..After backing up and ghosting my computer.... I have now downloaded and installed your driver. And....It finally WORKS with SPDIF in XBMC :) I am soo happy I can´t find words. My HTPC is now working as it should with XBMC. I can finally watch my Movies with 5.1 sound. And it Kicks Ass :) WOOOW....

Even the Stereo sound in all speakers is much better. I have not yet watched a whole film, but I have tested for like 45 minutes, and so far so good :) 1000 000 Thanks.

Keep up the good work :) My very Best Regards From Sweden //Mr P

Happy new year :) I understand what you're saying about OPL being outdated, but it's a very nice feature with a very unique sound you won't find in any other synthesizer. There's many good applications that work best with OPL, and if you do a quick search, you'll see that there's still an enthusiast community trying to circumvent the lack of proper OPL support in XP with OPL emulators (not particularly good) and even an "OPL passthrough" solution, which unfortunately does not currently work with CMI8738 as it's chipset-dependent, not to mention the application has to specifically support it. Linux drivers surprisingly support OPL for CMI8738! but this OS is pretty much useless to most people. Anyways, here's a plus: CMI8738 cards are still being produced today, so OPL could see a revival!

If it's not that much of a trouble, would pretty please add support for this? A sound card offering everything the CMI8738 does, blessed with such amazing drivers, that's most uncommon, it's the whole package! low latency, bit-perfect SPDIF, selective sample rate output, you name it, the musician's dream, and OPL support can only expand our possibilities, come on, you're literally our last and only hope :)

Best regards.

leila, judging from the general quality of engineering that went into the chip design, the OPL synth on the cmedia silicon should be rather bad in terms of quality and compatibility to the yamaha original. In any case, the driver is open source and I'd be happy to accept a patch that reliably exposes the OPL part to Windows.

An another happy user here. The driver made my day as the original was conflicting with my AverTV card when using the S/PDIF output. Thank You very much!

Thank you so much, for developing this driver! It is the ONLY one for my CMI8738-MX based PCI Soundcard that really works for me without errors in Windows 7 64bit and delivers really good soundquality from my 8,50 Euro Soundcard! Great work! :-)

Thank you for your work. How I can write sound with SPDIF in? I unselected SPDIF mute in sndvol32 /record and muted all other interfaces. But at the SPDIF in nothing (I use optic link from satellite receiver). Of course I check in CMI8738-8768 Control Panel SPDIF input. What I do wrong?

anoxi, that's a little bit tricky, especially with post-XP versions of windows. Basically, you have to try a little bit to find the right settings in cmicontrol while also playing with the windows sound applet in the control panel. Sometimes, unloading and reloading the driver by disabling and re-enabling the soundcard in the device manager helps!

I was going to buy the AUZENTECH X-Raider 7.1 Sound card which uses the 8768 chip.Would i get 24/96 output with your driver?

chunk, afaik, the chip has no 24 bit capabilities. No matter what driver you are using, you are always limited to 16 bit. On a side note, the Auzentech cards are examples of hideous engineering: the analog front-end of the 8768 is by no means a high-fidelity device - putting some golden egg opamps in the chain is not going to improve the overall quality.

Thanks dogb for that clarification. It's a bit naughty of auzentech to claim 24 bit capability with this chip. The analogue output woudn't have mattered to me anyway as i would be using optical out only. The specs for this card can be seen here http://www.pixmania.co.uk/uk/uk/5311604/art/auzentech/x-raider-7-1-sound-card-p.html?srcid=867&key=NRt6cUFqPLeLftEsBjxWASkYQXFfRd7hHOgXMwU0ZUpxeRAmOrLRIdkhATAGU31MFCENDQ==

dogber1,

Are there any plans to support also CMI8788 (AV100,AV200) ?

exl..., nope - it's a completely different chip.

Thank you so much for this driver. I struggled all day to get my sound card's S/PDIF working in Win7 64-bit thanks to C-Media's useless drivers. This driver did the trick. You sir, have my gratitude.

dogber1,

how can we run two (or more) soundcards 8738 chips and get multiple outputs from it. is there any tricks using cmediadrivers ?

TIA.

anpaulus,

in principle, an instance of the driver (and subsequently an audio device) should be generated for each physically present sound card. I have tried it with two soundcards once and it didn't work - it might be a bug in the driver, but I suspect that there's something wrong in the hardware so the addressing becomes ambiguous.

still curious what's the problem with it, have you try with the same 8738 chips and reinstating two drivers with different addressing. I had 3 soundcards 8738 chips same brand and willing to try with your cmidrivers, can you give me steps to split out the installation (inf and cat files), therefore every single card will have specific driver. I will post here if there is any progress. TIA.

you just install the driver for each soundcard... for me, basically the first and second soundcard failed to function after installing the driver for the second card.

Dog, don't know whether you can answer this BUT...I have a driver file for the CMI8768 that is for an Auzentech Mystique sound card (which I have installed in my HT computer system. Do you think this driver would work in any other (brand) card that uses this same chip?? Thanks in advance. Jim

Jim, I have no idea