[vfio-users] PCIe Sound Card VFIO Pass through Sounds Terrible (link to audio file)

[Rokas Kupstys]

Could you describe how you set it up?

Rokas Kupstys

On 2016.09.30 16:36, sL1pKn07 SpinFlo wrote:
> yes. i have working it, but yes, with a very little cracking some
> times. but is perfect payable (used in Worl of Tanks)
>
> 2016-09-30 15:27 GMT+02:00 Rokas Kupstys <rokups at zoho.com>:
>> You have it working? I tried (although through alsa) but sound was very
>> poor quality.
>>
>> Rokas Kupstys
>>
>> On 2016.09.30 16:19, sL1pKn07 SpinFlo wrote:
>>> why not use the sound card through pulseaudio?
>>>
>>> (damn you , ML/gmail)
>>>
>>> 2016-09-30 13:00 GMT+02:00 Jonathan Scruggs <j.scruggs at gmail.com>:
>>>> Hi all,
>>>>
>>>> I have a PCIe sound card that I wish to pass through to a Windows 10 guest
>>>> using VFIO, but it sounds terrible.
>>>>
>>>> Kernel: Linux Beast 4.7.5-gentoo #5 SMP PREEMPT Thu Sep 29 11:26:39 BST 2016
>>>> x86_64 Intel(R) Core(TM) i7-5930K CPU @ 3.50GHz GenuineIntel GNU/Linux
>>>>
>>>> Qemu version: app-emulation/qemu-2.7.0-r4::gentoo
>>>>
>>>> Libvirt version: app-emulation/libvirt-2.2.0
>>>>
>>>> The sound card is:
>>>> 09:00.0 Audio device: Creative Labs Sound Core3D [Sound Blaster Recon3D /
>>>> Z-Series] (rev 01)
>>>>
>>>> The relevant part of the XML file is:
>>>>     <hostdev mode='subsystem' type='pci' managed='yes'>
>>>>       <driver name='vfio'/>
>>>>       <source>
>>>>         <address domain='0x0000' bus='0x09' slot='0x00' function='0x0'/>
>>>>       </source>
>>>>       <address type='pci' domain='0x0000' bus='0x00' slot='0x0a'
>>>> function='0x0'/>
>>>>     </hostdev>
>>>>
>>>> The Audio I'm trying to play: https://www.youtube.com/watch?v=jc8Mm5TtIhg
>>>>
>>>> What it actually sounds like:
>>>> https://drive.google.com/file/d/0B12vXeyT8c8HZ0RqMmpnWDZUdXM/view?usp=sharing
>>>>
>>>> To record the Audio, I plugged the cable into a recorder instead of going
>>>> through speakers or line in on the host to see if it was any other device,
>>>> but it sounds the same on all.
>>>>
>>>> I hope you can help.
>>>> Jon
>>>>
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