Re: assigned EHCI USB headset not working

["André Weidemann" <Andre.Weidemann@web.de>]

Hi Jan,

On 09.06.2011 08:53, Jan Kiszka wrote:
> On 2011-06-09 08:19, André Weidemann wrote:
>> Hi Gerd,
>>
>> On 08.06.2011 14:49, Gerd Hoffmann wrote:
>>> Hi,
>>>
>>>> The sound device shows up under Windows7 and drivers are installed
>>>> automatically. Unfortunately it does not work. All the players I tried,
>>>> did not even start playing the sound file, although they detected the
>>>> DirectSound Device.
>>>
>>> iso xfer's from usb-linux via ehci are flaky for reasons not yet tracked
>>> down.
>>>
>>> Any reason why you don't just plug in a virtual sound card? The HDA
>>> emulation should work fine with win7.
>>
>> Using the hda driver was my first attempt. But the result was not very
>> convincing. When playing mp3s inside the VM, I could hear music coming
>> from the speakers, but the sound was very choppy and too slow. It was no
>> joy listening to it.
>
> Does "export QEMU_AUDIO_DAC_TRY_POLL=0" before invoking qemu helps? It
> depends on your host-side interface. Using ALSA here, it is generally
> required.
>
> Note that this discussion rather belongs on qemu-devel.

Thank you very much. Setting the variable did the trick.
Could this perhaps be included in the man page? I am sure there will be 
others who will eventually run into the same problem as I did.

Regards
  André