Opened 9 years ago. 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. The Realtek drivers would be a reasonable solution, if they worked properly – there seem to be issues with audio crackling and volume control. Tried in Windows 7 32bit and 64bit guests. It remains that AC97 and HDA are not compatible at all, they use entirely separate drivers and implement entirely different interfaces. Last modified 9 years ago.

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The same defect also occurs on Win32 host running a Win32 guest, as well as on Win64 host running a Win32 guest.

Follow the easy instruction, and let this program install to the chosen directory given for a sucsessfull install. So the reason is somewhere else, and the response about missing bit support is not relevant. I used this drive on an eMachines W PC and it worked fine. Icy closed defect: These are just a few examples, but they don’t always report this in the marketed product type, when they judge that the disabled feature is not essential for their market, or when they can provide workarounds around some common defects.

Realtek AC ’97 in Win 8 64bit – Microsoft Community

Implementing a virtual HDA controller is likely ic way for the VBox guys to go long term it’s supposed on modern Windows and Linux versions without manufacturer-specific drivers but that’s a non-trivial endeavor. But someone needs to explain then why my “virtualized” hardware PnP device Winddows are different. It almost certainly doesn’t windowe both. How satisfied are you with this reply? As winsows as a device supporting both HDA and AC97, if that’s indeed the case, it’s either two PCI functions logical devices supported by one device, or two separate devices entirely.


Are read-write access to registers effectively altering the contents of other related registers? Even CPU processors have bugs, the situation is even worse with today’s GPUs which are even more complex and where none of them are fully working fully as described in specs, or even wokeing the same way in the same production series, with some parts generating errors that need local corrections, or with parts failing quite rapidly because of heat or because of random defects in the chemical production process; chipsets are also very complex units as they work with so many different clock constraints, that need special autodetection algorithms to provide alternate working paths either in the software driver or in the mutable firmware embedded in the firmware.


Note that although the discussion isn’t useless it really doesn’t belong here. Your email address will not be published. This is just the first step, not the final solution. In that case you’ll still need to support it for some time at least for the next 3 yearsbecause lots of customers will ONLY be able to support paravirtualization Ac79 VirtualPC for Vista, this is what Microsoft chose, using a simple entry to the hypervisor, for its virtual audio winsows driver.

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

All hardware has bugs; the ones you listed don’t seem that windwos. You may use these HTML tags and attributes: ICH6 is not only hard disk controller, but whole chipset specification. It solves ad97 for me. 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 wondows 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.


If, this can explain why Windows Winddows can find a driver for you, and not for me.

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Tech windoss scams are an industry-wide issue where scammers attempt to trick you into paying for unnecessary technical support services. Did this solve your problem? How VMware Workstation solved this problem?

Hi I’ve recently installed Windows 8 on an XP computer. Added myself as CC on this issue. Anyway, this still does not explain why the SB16 emulation offered in VirtualBox does not work either. All downloads available on this website have been scanned by the latest anti-virus software and are guaranteed to be virus and malware-free.

Please attach a VBox.

Thanks for your feedback, it helps us improve the site. 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 wundows, 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 to ichh accessing to other unrelated mapped addresses in use by another device, and causing for example display corruption, or failure of other critical hardware.