This can only be explained by differences in the emulation layer of the host, not on the guests as they are strictly identical. When a register is used to index and remap other registers in the allocated IO space for example to map audio data buffers in the small IO space before writing to them , is this setting remembered? The PnP enumerator also indicates that the following compatible IDs should be used to match a driver:. Another cause of problem is the possible lack of implementation in the VirtualBox host of the audio data format coming from the guest: You can help protect yourself from scammers by verifying that the contact is a Microsoft Agent or Microsoft Employee and that the phone number is an official Microsoft global customer service number. It may explain why this audio device is no longer supported by Intel, Microsoft, or the OEM manufacturers that included it. Bug looks like a duplicate of this one.

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To see more matches, use our custom search engine to find the exact driver. May be it works because your actual audio on winvows host is effectively compatible with AC’97 and your audio device is still more basic But more recent “HD Audio” devices are not all directly compatible with this older AC’97 specification which seems to be supported only as a local-only virtualization, indirectly on the guest where it reuses the actual HD Audio driver in a lower layer of the guest OS, and only t oprovide backward compatibility within some applications ; HD Audio devices include additional security requirements which are part of the DirectSound driver model specification for managing, for example, the HDCP protocol over HDMI and digital audio output jacks, and for managing DRM rights and data encryption for the highest quality output including within the audio mixer which cannot mix unsecured and secured audio sources and render a high quality mixed signal to an unsecured analog output.


It sounds like the VirtualBox guys should do one of: Are you correctly describing the ressources to the guest and honoring the PCI allocations requested by the guest according to the PCI capabilities that were given? Added myself as CC on this issue.


Other bugs were that the last few bytes of audio data were not played under some conditions causing audible “clicks” in the best cases ; but in some cases, some extra bytes after the end of buffers were accessed as well possibly causing bus errors due to unmapped memory addresses or IO ports, or causing the audio hardware icy try accessing to other unrelated mapped addresses in use by another device, and causing for example display corruption, or failure windoows other critical hardware.

The SB16 emulation likely doesn’t work for the same reason, nobody ever wrote a bit driver for it because nobody would or could use an SB16 in a bit machine. This situation is understandable, since I don’t think any real bit capable machine would have had that audio chipset so why would anyone release a driver for it icch than for VirtualBox?

Realtek AC ’97 in Win 8 64bit

Do you support all the needed register access orders used by drivers? I’m not even sure that VirtualBox can deliver secured “HD” audio over the virtualized device without breaking the authentication chain, if the driver installed on the guest is not itself “certified” by Microsoft WHQL, or at least digitally signed with a software certificate from as “reliable” PKI provider. The driver work in most situations, but there are problems when too many VMs trying to use sound.

And yes, sandervl73, I understand that your reply was a joke a form of disguised critic. None of the solutions found do really 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.

As I mentioned, no actual bit-capable machine would have had this hardware. 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 and their capabilities. HDA either wasn’t there back then or rather unsupported. I think you’re misunderstanding how the driver interface works – AC97 vs.


Your email address will not be published. To make the audio device work, you need to install a driver for it.

Realtek AC97 Audio Driver for Windows 10, , 8, 7, XP, Vista – Driver Talent Blog

And they’ell be also able to uninstall the “physical” devices from their guest OS by turning off the emulation when unchecking the associated emulations offered by VBOX in its configuration panel. According to control panel there is no sound card connected, and the loudspeaker near the date in the bottom right corner of the screen has an windpws on it.

Opened 9 years ago. There’s no such device reported in the Devices control panel anyway.

• View topic – [Solved] Realtek AC’97 Audio in Win98

I did not say that this was the same driver to use in Windows. In reply to Andre Da Costa’s post on December 22, Do I need a VirtualServer host?

Here is the VBOX. And exactly the same VM image containing an installation of either Vista bit or Windows Seven bit works sucessfully and can play sounds if using that VM image in VirtualPC which does not use this virtual device but its own different virtual device, visible with its own PnP Windoas and its own addional guest driver specific to VirtualPC’s emulated sound device.

Use the AC97 device. Contact — Privacy policy — Terms of Use. Thanks for any help in advance!

Sound is working fine on the same host with an XP guest. Are there other conditions in order to support DirectSound record sources? The only problem is that the soundcard wc97 work. Reboot the Computer After all the drivers are fixed or installed, reboot the computer for all changes to take effect. Are the emulated device registers returning the correct flags? Did this solve your problem?