Windows Vista Forums

Sound breaking up

  1. #1


    Tom Bizon Guest

    Sound breaking up

    Thanks for the previous help with my newbie questions.....I took the plunge
    and installed VPC2007. I'm running Vista Home Premium as host and XP Pro as
    guest.

    I'm having a problem with sound on the guest. The sound is there, but the
    audio sounds like it's breaking up with lots of short drop-outs or starting
    and stopping as described in another post. It sounded like it was a resource
    problem in the other discussion where it took a lot to emulate the sound
    device, hence the poor audio. That may be my problem too....although I have
    a 2GHz dual-core with 3G of RAM (512M allocated to XP). Does anyone have any
    insights or solutions to this problem?

    TIA
    Tom

      My System SpecsSystem Spec

  2. #2


    Bo Berglund Guest

    Re: Sound breaking up

    On Wed, 17 Dec 2008 10:05:01 -0800, Tom Bizon
    <TomBizon@xxxxxx> wrote:

    >Thanks for the previous help with my newbie questions.....I took the plunge
    >and installed VPC2007. I'm running Vista Home Premium as host and XP Pro as
    >guest.
    >
    >I'm having a problem with sound on the guest. The sound is there, but the
    >audio sounds like it's breaking up with lots of short drop-outs or starting
    >and stopping as described in another post. It sounded like it was a resource
    >problem in the other discussion where it took a lot to emulate the sound
    >device, hence the poor audio. That may be my problem too....although I have
    >a 2GHz dual-core with 3G of RAM (512M allocated to XP). Does anyone have any
    >insights or solutions to this problem?
    >
    Did you install the Virtual Machine Additions in the guest yet?
    Are you running on a laptop host? If so then have a look at the power
    settings in order to adjust them for better performance.

    --

    Bo Berglund (Sweden)

      My System SpecsSystem Spec

  3. #3


    Tom Bizon Guest

    Re: Sound breaking up

    "Bo Berglund" wrote:

    >
    > Did you install the Virtual Machine Additions in the guest yet?
    Yes....I did install the Virtual Machine Additions

    > Are you running on a laptop host? If so then have a look at the power
    > settings in order to adjust them for better performance.
    >
    I am running on a laptop (plugged in, FWIW). I'll give it a try later
    (don't have that computer with me now). I assume you are suggesting a more
    "high performance", but also more power hungry setting.

    Thanks
    Tom

      My System SpecsSystem Spec

  4. #4


    Tom Bizon Guest

    Re: Sound breaking up

    I wasn't able to get it to work by changing power settings. I'm still having
    the audio problems. Is it that the emulation of the sound card is consuming
    more resources than my computer has or is it a potential driver problem?

    My immediate workaround was to disable sound in VPC....but now I get the
    annoying DOS beep when it needs to make an "attention" sound.

    Thanks for any help
    Tom



    "Bo Berglund" wrote:

    > On Wed, 17 Dec 2008 10:05:01 -0800, Tom Bizon
    > <TomBizon@xxxxxx> wrote:
    >

    > >Thanks for the previous help with my newbie questions.....I took the plunge
    > >and installed VPC2007. I'm running Vista Home Premium as host and XP Pro as
    > >guest.
    > >
    > >I'm having a problem with sound on the guest. The sound is there, but the
    > >audio sounds like it's breaking up with lots of short drop-outs or starting
    > >and stopping as described in another post. It sounded like it was a resource
    > >problem in the other discussion where it took a lot to emulate the sound
    > >device, hence the poor audio. That may be my problem too....although I have
    > >a 2GHz dual-core with 3G of RAM (512M allocated to XP). Does anyone have any
    > >insights or solutions to this problem?
    > >
    >
    > Did you install the Virtual Machine Additions in the guest yet?
    > Are you running on a laptop host? If so then have a look at the power
    > settings in order to adjust them for better performance.
    >
    > --
    >
    > Bo Berglund (Sweden)
    >

      My System SpecsSystem Spec

  5. #5


    d d Guest

    Re: Sound breaking up

    Tom Bizon wrote:

    > I wasn't able to get it to work by changing power settings. I'm still having
    > the audio problems. Is it that the emulation of the sound card is consuming
    > more resources than my computer has or is it a potential driver problem?
    >
    > My immediate workaround was to disable sound in VPC....but now I get the
    > annoying DOS beep when it needs to make an "attention" sound.
    >
    > Thanks for any help
    > Tom
    I'm hoping too for some good hints coming from this thread. I also have
    some sound issues where sounds sometimes echo/double-up and sometimes
    break up.

      My System SpecsSystem Spec

  6. #6


    MLyons10 Guest

    Re: Sound breaking up

    I'm experiencing the same problem. I've allocated 1 GB of Memory to XP,
    which should be plenty (I upped it from 512 MB's with no improvement). The
    sound is just really choppy. Does anyone have any ideas?

    Thanks,

      My System SpecsSystem Spec

  7. #7


    Robert Comer Guest

    Re: Sound breaking up

    Not really, I've never found a way around it, it's just hard for
    virtualization products to do as it's pretty software intensive.

    --
    Bob Comer



    On Tue, 13 Jan 2009 21:51:01 -0800, MLyons10
    <MLyons10@xxxxxx> wrote:

    >I'm experiencing the same problem. I've allocated 1 GB of Memory to XP,
    >which should be plenty (I upped it from 512 MB's with no improvement). The
    >sound is just really choppy. Does anyone have any ideas?
    >
    >Thanks,

      My System SpecsSystem Spec

  8. #8


    d d Guest

    Re: Sound breaking up

    Robert Comer wrote:

    > Not really, I've never found a way around it, it's just hard for
    > virtualization products to do as it's pretty software intensive.
    Maybe that implies that the performance options maybe tweakable to make
    a better sound experience (e.g. giving the host or guest more or less
    CPU priority).

      My System SpecsSystem Spec

  9. #9


    MLyons10 Guest

    Re: Sound breaking up

    It's a shame that sound remains an issue. Sound just doesn't seem to be very
    CPU when running an OS outside of Virtual PC, so I don't know why it would be
    so poor within Virtual PC. I have already upped the CPU for the XP guest to
    1 GB, but when I get home I'll crank it up to the max (Whatever that may be)
    and see. When I run Task Manager it doesn't use much of XP's CPU, and on the
    Host it also is not very demanding of the CPU. Which begs the question "What
    does exactly cause this sound issue?" Is it the Virtual PC's interface
    between the guest OS and the audio card? Virtual PC does have some
    limitations as it relates to its ability to interact with certain things on
    the Host Machine, such as printers and such. Is the Audio Card another one
    of these limitations? It seems like something that should be supported...

      My System SpecsSystem Spec

  10. #10


    Steve Jain [MVP] Guest

    Re: Sound breaking up

    On Thu, 15 Jan 2009 11:05:01 -0800, MLyons10
    <MLyons10@xxxxxx> wrote:

    >It's a shame that sound remains an issue. Sound just doesn't seem to be very
    >CPU when running an OS outside of Virtual PC, so I don't know why it would be
    >so poor within Virtual PC. I have already upped the CPU for the XP guest to
    >1 GB, but when I get home I'll crank it up to the max (Whatever that may be)
    >and see. When I run Task Manager it doesn't use much of XP's CPU, and on the
    >Host it also is not very demanding of the CPU. Which begs the question "What
    >does exactly cause this sound issue?" Is it the Virtual PC's interface
    >between the guest OS and the audio card? Virtual PC does have some
    >limitations as it relates to its ability to interact with certain things on
    >the Host Machine, such as printers and such. Is the Audio Card another one
    >of these limitations? It seems like something that should be supported...
    Sound isn't an issue on the host, because the host has a sound card.
    In a VM, the sound card is emulated via the CPU. Anytime the CPU gets
    called for other processes/tasks, it will affect the sound, the slower
    and older the CPU the more pronounced.
    I rarely have this problem on my quadcores, or high-MHz dual-cores.

    All VM software has limitations on how it connects to the host
    hardware. The only thing that is directly accessible is the CPU, all
    the other "hardware" in a VM is emulated, be it VPC, VMW Workstation,
    or VirtualBox.

    --
    Cheers,
    Steve Jain, Virtual Machine MVP
    http://vpc.essjae.com/

      My System SpecsSystem Spec


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