Re: assigned EHCI USB headset not working

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

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.
I assumed that it may be a clocking issue, since the man page for qemu 
lists the module paramter "clocking=48000" for the i810_audio driver. 
The snd_hda_intel module however does not seem to have such a parameter.

I then double checked whether playing an mp3 works on the server, rather 
than from inside the VM. I used mpg123 to test it and mp3s play without 
distortion on the machine.

Regards
  André