The host audio doesn’t have anything to do with it, the audio is fully virtualized. It sounds like the VirtualBox guys should do one of:. This can only be explained by differences in the emulation layer of the host, not on the guests as they are strictly identical. We had trouble finding out that internal clock of the Controller could be buggy and would play out audio at an abnormal frequency. AC97 , audio , Windows7. Only the bit seems to be a problem..

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According to PnP databases on the web, it is the identifier that should be used to identify: Pros It downloaded on the first try?! Note that although the discussion isn’t useless it really doesn’t belong here. The guest additions are not required for the audio output.

Cons nothing i can think off Summary gigabyte should have added this to their website even for an old os Reply to this review Was this review helpful?

The Software may include portions offered on terms in addition to those set out here, as set out in a license accompanying those portions. Added myself as CC on this issue. May be it’s the mixer device instead of the audio device that does not work through the virtualization, and that does not properly enumerate the list of actual audio devices that it can control kch4 their capabilities.

I don’t think there’s any problems with the device emulating what it claims to be.

And possibly, this indicates a stability problem in the exposed ICH6 emulation used in VirtualBoxor the driver assumes some behavior ordering of events? This Software is licensed for use only in conjunction with Intel component products. It sounds like the VirtualBox guys should do one of: Audio Codec – is the actual unit responsible for converting bits into audio signals and imtegrated. Initially we were facing strange problems in adjusting the master volume, whereby when a particular value is written to the audio register, it jch4 read back totally different value.


Use the AC97 device. None of the solutions found do icu4 apply to VirtualBox emulations, because all these solutions using various OEM drivers with various workarounds for the same problems are only meant to solve variably the same issues in a real hardware but not in the virtual emulation where they are not at all relevant and where they would finally cause more problems.

But if this can work, it will make RealTek audio drivers certainly happier withit, with less unsupported workarounds for old hardware bugs. Please support our project by allowing our site to show ads. Many fast devices are produced today, and then tweaked after production by running series of tests to disable some parts of the device. Such license agreement may be a “break-the- seal” license agreement. Use instead this direct link which is much more reliable: Intel may make changes to the Software, or to items referenced therein, at any time without notice, but is not obligated to support or update the Software.

Are these registers honoring the correct distinctions between read and write accesses? Cons Every possible Con you could come up with is in this download.

DriverMax – MEDIA – Intel – Intel(r) ICH4 AC97 Audio Driver Computer Driver Updates

Note that the original Intel ICH6 hardware had known severe hardware bugs, documented by Intel, and some drivers have been tweaked to autodetect these caveats in order to avoid complete system lockup, notably when handling bus mastering. This can only be explained by conyroller bug in the device emulation on the host.


We don’t wait for partially filled buffers to fill till completion before playing them out since that would add latency. Strange enough, my PC supports both AC97 and HDA it also supports some old games that just support the SB16 working modedo you mean that it actually has two parallel devices?

Realtek* AC97 Audio Driver for Desktop Boards

The driver work in most situations, but there are problems when too many VMs trying ccontroller use sound. The device driver can be made complete by adding code to support recording.

Implementing a virtual HDA controller is likely the way for the VBox guys to go icg4 term it’s supposed on modern Windows and Linux versions without manufacturer-specific drivers but that’s a non-trivial endeavor. HDA either wasn’t there back then or rather unsupported. Sure, you need to refuse several offers of crapware at installation, but it was worth it!

Did you find the information on this site useful? If, this can explain why Windows Update can find a driver for you, and not for me. We do the bookkeeping to mark the buffer as empty, and the DMA engine then continues with the next available buffer in line till it reach the Last Valid Buffer.