Re: qemu-kvm

["Markus Breitländer" <breitlaender@stud.fh-dortmund.de>]

You can alter the sound driver settings by setting some variables before
starting the VM.

I use the following in my start scripts:

export QEMU_AUDIO_DRV=alsa
export QEMU_AUDIO_DAC_FIXED_FREQ=48000
export QEMU_AUDIO_ADC_FIXED_FREQ=48000
export QEMU_ALSA_DAC_BUFFER_SIZE=4096

Maybe this helps?

Greets,
  Markus

Am 13.02.2010 13:39, schrieb Alberich de megres:
> Hi!!
> 
> I got a curious situation that leads me to start sailing on qemu-kvm
> source code.
> 
> I got an audio latency very very high, even with some little cuts at
> playback. In qemu lists they told me qemu is synchronous, so if it
> take so long to draw high screen resolution audio could be affected.
> As I saw, qemu uses sdl to draw guest screen on host computer, my
> question is: when sdl draw it uses some kind of 2d acceleration?
> 
> Woulld it be hard to make for example screen draw asynchronously to
> audio playback? where would be a good point to start look for how to
> do it?
> 
> Thanks!
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