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Re: [Xen-users] Audio PCI passthrough issues in a Linux domU

Hello Arjen,

On Sat, May 11, 2013 at 2:32 AM, Arjen <arjenvanweelden@xxxxxxxxx> wrote:

I'm looking for suggestions on how to proceed. What logs should I inspect, what settings need checking? Might it be better to use Qemu sound emulation? Should I try XCP instead of my current dom0? Can someone point me towards more documentation about audio passthrough?

I've often noticed that onboard audio devices tend to be hung off of a PCI bus instead of a PCIe bus.  Sometimes they use a PCIe-PCI bridge, but either way, passing things hanging off of PCI has been a hit or miss affair every time I've tried, and it's never really been stable.

You said you've passed USB ports properly, and when faced with a similar problem, I solved it with one of these: http://www.amazon.com/Turtle-Beach-Advantage-Headset-Adapter/dp/B0036VO4XO

USB audio works really, really well, and even the super cheap adapters are quite functional... though I've seen their mic inputs susceptible to interference.  Nonetheless, if you don't want to "tech" your way out of the problem and really love cheap solutions, you should be able to find adapters of varying quality for about $3 or so, up to $80-ish.  After $20 or so, you're probably paying for more audio outputs/mixers/brand-name or something---the Sound Blaster X-Fi is a good example there; I've got one and it works great in Debian Linux with ALSA, ports and hookups all over the thing, too! :)

Andrew Bobulsky
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