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Topic: Homebrew CMI 8738 drivers (Read 535983 times) previous topic - next topic
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Homebrew CMI 8738 drivers

Reply #250 –
Just found out about this driver when I was about to give up on getting the SPDIF-in
to work with by SIIG SoundWave 7.1.
It works, but only for a couple of seconds while XP is booting.  Then the spdif sound stops
coming from the speakers ( other sound still works. )

I enabled spdif-in via cmicontrol, and in the windows sound mixer the spdif-in stream no longer shows up as muted.

After a reboot, it works again for a few seconds.

Any ideas ?  I'm using version 1.1.9 on 32 bit XP.

Homebrew CMI 8738 drivers

Reply #251 –
sam987,
I've just tested the recording feature again and it works. Usually, you have to enable SPDIF-In recording, tick the "Select secondary SPDIF-In" box and then start the recording software of your choice and press the record key. Then you should start playing the source and the recording should work. The only thing that might be important is to select a sample rate and resolution equal to the source material.

audigio, are you talking about spdif-in or spdif-out? The latter works only if passthrough mode is enabled for dd/dts streams, or if the speaker configuration is set to stereo. SPDIF can carry only uncompressed stereo signals. Signals for more than two speakers have to be pre-encoded for compression (dd/dts) - such precoded streams are for instance on DVDs.
Once you set the windows speaker configuration to something other than stereo, the kmixer upmixes every stereo stream to that n-channel format by interleaving zeroes for unused speakers, and because the driver doesn't have a dolby digital live or DTS connect encoder, it disables the SPDIF ports and plays the stream via analog ports only.

Homebrew CMI 8738 drivers

Reply #252 –
hi dogbert its muds470 from avforums, i had a problem getting 5.1 dolby digital etc?

Anyways i installed the card again, used your drivers, now i am playing standard mp3s, and i get interference, i have followed your thread some of it  i understand some i dont!
whats kernel etc??

Anyways, i had a previous soundcard i dont know maybe thats whats conflicting, i removed it, but i dont know how i can see if thats been disabled or it may even be onboard.

Now a few times i have used vlc changed to a52 and got full 5.1, i tried the kingdom etc it worked! But later i couldnt get it to work, ie the next day! I think maybe the drivers were conflicting, i have been to windows and deleted some of the files you have stated previously, ie dll files.

The drivers which i have saved are in a desktop folder, is that why theres a problem?

Homebrew CMI 8738 drivers

Reply #254 –
Quote
Hi Dogbert, this is about spdif-in.

so how do you determine that spdif-in recording works while XP is booting? and why should the sound "stop coming from the speakers"?

mohammed, driver conflicts are usually not an issue. also, I'd like to ask you to keep things on one board for the sake of simplicity - thanks.

Homebrew CMI 8738 drivers

Reply #255 –
Quote from: Dogbert on
Quote
Hi Dogbert, this is about spdif-in.

so how do you determine that spdif-in recording works while XP is booting? and why should the sound "stop coming from the speakers"?

The speakers I'm talking about are the speakers driven by my PC.

My CD player is connected to the S/PDIF-in port of my PC.  When the CD player is playing a CD while the PC is booting,  I hear the music coming from the speakers connected to the PC.  The speakers are driven by the SIIG soundwave 7.1 card that has the S/PDIF-in port. 

The sound comes out of the speakers while windows is showing the screen with the black background and the blue bar going back and forth.  When the screen changes to the login screen with the blue background the music from the CD player stops coming from the PC's speakers.

Homebrew CMI 8738 drivers

Reply #256 –
that's the so called "monitor mode" - the soundcard converts the signal on the SPDIF-in port to the analog ports. This is fundamentally different from recording stuff on the spdif-in because it's done entirely in hardware. Exclusive access to the DAC is required for regular PCM playback so the monitoring stuff will be disabled when the soundcard is being initialized.
There might be some combination of register settings to re-enable this, but I haven't bothered to take a look at it because this is rarely used.

Homebrew CMI 8738 drivers

Reply #257 –
Hi, I have just purchased a new trust 5250 card and have installed your custom drivers. I have an optical lead connecting my optical out to my external Beresford dac then into my amp and speakers.

When I try to use kernel streaming, flac plays perfectly in winamp but when I try to play mp3’s I only get static! Bit odd, perhaps due to changing soundcard (used to be sb xfi)? Anyway in asio with the asio4all drivers it works perfectly with mp3’s and flac.

Is Asio giving me a bit perfect output with winamp?

Any input on how to fix the kernel streaming problem is much appreciated, if its bit perfect with asio tho that’s fine too!

Cheers

Simon

Homebrew CMI 8738 drivers

Reply #259 –
Quote from: Dogbert on
can you reproduce the static with foobar in conjunction with its KS output plugin?



A reinstall solved it, thanks for the help though.

However, other things such as youtube and slingplayer (for my slingbox) will not play sound and say faulty driver. Is there a fix for this?

Thanks

Homebrew CMI 8738 drivers

Reply #260 –
software players which use KS have exclusive access to the soundcard to the effect that other applications can't play sounds.
if you are using XP, you might not need to use KS to achieve bitperfect playback - I've put an article on my site which elucidates the basic principles of it.

Homebrew CMI 8738 drivers

Reply #262 –
sebastian, sorry, no idea - I've never used MDs. My guess would be that in a CD player after a track the SPDIF signal is shut down for a short amount of time and restarted. A regular software player usually plays the tracks in a continuous fashion, hence the tracks can't be detected.

Homebrew CMI 8738 drivers

Reply #264 –
not necessarily - a buffer large enough to fill the gap between signal shutdown and start, a drive which can read faster than 1X and some DSP which glues the end of the finished track to the start of the new track should be sufficient means to achieve gapless playback. But as I said, that's just a guess.

Homebrew CMI 8738 drivers

Reply #265 –
Hello,
I am using the 'Xp' version of DB's driver with a trust card[sc5250]. I was hoping to use the spdif-out to an amp and the spdif-in on the card with a mic. I have tried every configuration[I think ] in the control panel that I can,  but I can't get the mic to work.
Please advise.
thnx.

Homebrew CMI 8738 drivers

Reply #267 –
Quote from: Dogbert on
keeto, what mic do you have and what software do you use for recording?

Sorry, should have included:
a basic mini-jack mic [spdif-in] and msn.
the ''in/out'' config???- can't use the native drivers[with yours] for the analogue in so, any way around this?
Thnx
 

Homebrew CMI 8738 drivers

Reply #268 –
Quote from: keeto on
[...]a basic mini-jack mic [spdif-in] and msn

A basic mike won't work when connected to the SPDIF-in. You should connect it to the MIC jack (usually a red-coloured jack).

Homebrew CMI 8738 drivers

Reply #269 –
Quote from: Egor on
Quote from: keeto on
[...]a basic mini-jack mic [spdif-in] and msn

A basic mike won't work when connected to the SPDIF-in. You should connect it to the MIC jack (usually a red-coloured jack).

I have a connector/adaptor for a mic[mini-jack] to spdif. if I try to connect the mic to the analog input on the card[it's pink], there's no sound because[???] the drivers are not loaded for the card, only dogbert's...
do I need the native drivers for the card in order to get the mic to work?
thnx for your help

Homebrew CMI 8738 drivers

Reply #270 –
No, Dogbert's drivers should work fine. Try to connect to the MIC connector and enable in the control panel the "Mic boost" option (see additional cmedia driver configuration in the system contol panel), don't forget to turn on Microphone in the Volume control.

Homebrew CMI 8738 drivers

Reply #271 –
I have tried to use the analogue[mic in] on the sound card and the spdif out config.
The 'complaint' from the microphone setup wizard is that 'I can't have a simultaneous connection'...ie. pple would hear me, but I couldn't hear them[or vice-versa] with the config the way it is now.
Had a go at all possible[~] configurations in the C-media control panel[as well as the audio and sound setup[OS control panel] , but no joy.
There's no point in contacting the sc[trust] native driver company as this is not a version[dogbert's] that they have written.
Any other ideas...perhaps Dogbert could weigh in here.
thanks Egor all the same

Homebrew CMI 8738 drivers

Reply #272 –
keeto, the microphone is analog - the "converter" you have is presumably just an electrical connector for notebooks which have shared spdif/analog jacks. It needs some electronics for an analog signal to be converted to its digital representation. This is the reason why the SPDIF-In recording from the mic doesn't work.
As Egor correctly stated, you need to connect the mic to the analog mic-in. Recording from the mic-in works, but the recorded sound isn't automatically played to the digital ports.

Homebrew CMI 8738 drivers

Reply #273 –
thanks.

it is a connector/adaptor-one end fits onto the mic-jack and the other into the spdif on the card.
I was hoping to use the mic for conversing in msn/similar.
Is this possible or no...?
keeto