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Re: [Qemu-devel] Audio latency


From: malc
Subject: Re: [Qemu-devel] Audio latency
Date: Thu, 11 Feb 2010 09:53:02 +0300 (MSK)
User-agent: Alpine 2.00 (LNX 1167 2008-08-23)

On Thu, 11 Feb 2010, Alberich de megres wrote:

> I'm using the alsa driver.
> Even I tried to change some values using the export and some flags
> that -audio-help shows, but nothing significant.

Please do not top post.
 
> 
> 
> On Thu, Feb 11, 2010 at 1:03 AM, malc <address@hidden> wrote:
> > On Thu, 11 Feb 2010, Alberich de megres wrote:
> >
> >> Hi!
> >>
> >> I'm running qemu on suse, and i got a very high audio latency. For
> >> example, using windows latency is about 4s and audio gets distorted
> >> with little cuts.

How do you measure it?

> >> On the host side (suse), i changed the audio pci device latency to 99
> >> but this only improves a little bit.

As in: with setpci?

> >> Other thing i noticed is when lowering video resolution, the audio
> >> latency gets better and better.

Lowering video resolution of what? Guest, host?

> >> I started played with source code, but i'm just a newbie on qemu.
> >> Anyone can point some light to me please?
> >>
> >> thanks guys!!
> >
> > -audio-help is your friend, from there you can deduce (at the very least)
> > which audio driver your qemu uses.
> >

It would also help to know which version of QEMU you run and exactly how
you invoke it.

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