Multiple audio playback devices

I have just built a system using the K7N2-L mainboard and am having a problem with multiple audio playback devices.
Actually I have TWO problems, which are probably unrelated.
I have a 5.1 speaker system connected to the onboard audio and an external USB DAC for playback through a hi-fi system.  
The first problem is that the USB audio device is only recognised if it's plugged in after the system is booted.  If it's already attached when I power up, it appears not to be properly installed.
The second problem is that when I use the Sounds and Multimedia control panel to switch audio devices (Windows 2000 pro) playback continues through whichever device was used first.  In order to switch, I have to reboot the computer.
Another system I built using an Epox nforce board does not have this second problem, although it does have the first.  With the Epox board, I can even play through both devices simultaneously.

I gathered this from the handbrake side of things:
You can also combine Pro Logic II and AC3 pass-through. This will give you a file that will play anywhere from QuickTime to VLC to the iPhone (using the AAC Pro Logic II track) and play in true surround sound on an AppleTV or in Perian. It is the best of both worlds, and it is only possible in the .mp4 and .mkv containers. Again, MP4 file names must, confusingly, end in .m4v for QuickTimeto read them. To use this hybrid format, in the Audio tab, set the first audio track to be the track you want, in AAC sound. Then set the second track to also use the same source track, and select AC3 pass-through."
I think this is what will ultimately help me. I will let you know.
the answer was righ under my nose.
Thank you!

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    Message was edited by: kglad

    First of all, thank you for replying my message!
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    LINEAR, 22050.0 Hz, 16-bit, Mono, LittleEndian, Signed
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    Hi @dskrobow,
    Welcome to the HP Forums!
    It is a terrific place to find answers and suggestions!
    For you to have the best experience in the HP forum I would like to direct your attention to the HP Forums Guide Learn How to Post and More
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    HP Notebook PCs - Troubleshooting HDMI Display and Sound Issues.
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    Have you ran the Windows troubleshooter?
    If you appreciate my responding please click the kudos button below to say thanks.
    Good Luck!
    Sparkles1
    I work on behalf of HP
    Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
    Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!

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