[Qemu-devel] Re: [PATCH] [RFC] Add support for a USB audio device model

[H. Peter Anvin]

On 09/10/2010 05:28 PM, malc wrote:
> On Fri, 10 Sep 2010, H. Peter Anvin wrote:
> 
>> I discovered that none of the audio device models supported by current
>> Qemu/KVM appear to be supported out of the box on Win7 64 bit (AC97
>> works fine on 32 bit).  The most logical ways to fix that would be to
>> add a long-term supportable audio device model.  Intel HD Audio and
>> USB Audio seemed like the most reasonable options, but I opted for USB
>> Audio for a few reasons:
> 
> I'll look at it tomorow, in the meantime it would be great to know
> how to test it (i.e. how to build the kernel which includes the
> driver for this thing)

Any remotely recent stock distro should have support for it.  I say
"should", because I haven't actually tested it with a Linux guest yet.

I'll try to do that later; I have to leave now.

> Oh and is the audio output bad when using linux guest too? (I don't
> have any windows guests to test this part of the equation)

Yes; I also have an stderr message in the patch

> P.S. The patches have lot's of tabs in them btw.

*Sigh* my tools are tuned to Linux kernel development, I'm afraid.

> P.P.S. There's an extension to your Intel HDA Audio option:
>        to get the HDA code from VirtualBox and "port" it to QEMU.

I know.  Someone else is welcome to do that... since it would require
knowing both the VirtualBox and the Qemu sound subsystem interfaces and
in what ways they are similar or different.

        -hpa