Re: assigned EHCI USB headset not working

[Jan Kiszka <jan.kiszka@web.de>]

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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.

Jan


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