Originally Posted by daking
Yes. Windows 7 Home Premium. 32 bit.
I can't say that it's a vanilla W7 installation. I've installed Sharky's codec pack and installed the HD Realtek audio driver. I can get specifics on build numbers, audio config, etc later if helpful.
How can you conclude that audio drivers have no impact?
The W7 core only allows the user to select one default audio device at a time (you know, when you go to the control panel and open the sound). So, when you select say HDMI as the default audio device, any program that uses the default audio device will send the sound to the default OS device, which would be the HDMI. That why I said the drivers don't matter.
You are claiming audio on both HDMI and analog when using W7MC. W7MC uses the windows default audio device so that is why I'm very suspect of your claim. Others are too. There isn't anyone else that had made W7MC play back audio simultaneously on both HDMI and analog properly. By properly, I mean that the HDMI will receive the multi-channel or bitstreamed audio formats.
Now, having written that, W7 programs are not limited to using the OS default audio device. If a program bypasses the build-in W7 default sound device and goes directly to the hardware then it can play back on a different device than what is set in the OS settings. However, that program would have to allow the user to select 2 different audio devices at once to get sound from say HDMI and analog at the same time. If you know of such a program then post it because it could be useful to some people.
The thread starter did post the first work-around that I have seen however it doesn't work for the multi-channel audio formats. Using that "fix" the HDMI only receives stereo. Fine for music but kills the audio when using W7MC for video playback. So, there is one partial work around but it's certainly not a perfect solution or an automatic solution that just works.
So, since you are claiming W7MC outputs sound on both HDMI and analog devices simultaneously then go into your setup and figure out what makes it work. If you can not demonstrate how it works then no-one will really believe the claim.
One thing the OP should note - use say WMP set specifically to analog and the "fix" that you posted and you'll get stereo music on both HDMI and analog at the same time. Then, use say WMC or some other program to play video over HDMI and you'll get the multi-channel audio on the HDMI only. Not perfect but a close fix.