Re: [orca-list] Sound latency in KVM

[kendell clark <coffeekingms gmail com>]

hi
I've seen the missed characters issue in espeakup. I'm not going to be
of any help whatsoever, because I dont' have a clue what causes it, but
this only seems to happen if you start espeakup after pulse audio and
speech-dispatcher start. To test, try killing orca and
speech-dispatcher, and see if performance improves. If it does, I'll add
this to my to track down list. In the long run, I'd like to be able to
use speakup with speech-dispatcher with the speechdup bridge, but this
would need someone to maintain the old  abandoned codebase and bring it
up to modern linux standards, add systemd support, add a systemd service
file and all that, and I just don't have the skills. Espeakup is
abandonware, and while it does work, I'd like something that supports a
wider range of speech synths than just espeak for those stubborn enough
to refuse to use it.
Thanks
Kendell clark


On 09/24/2015 04:23 AM, Tony Baechler wrote:
> On 9/23/2015 10:24 PM, Luke Yelavich wrote:
> > You can take steps to reduce the latency with VMWare guests. Here is  a
> > guide I found that helps you do just that.
> >
> > http://blog.bryansmart.com/2012/02/16/low-latency-sound-for-vmware/
>
>
> Is there such a guide for Qemu/KVM?  Yes, I admit I haven't looked
> myself. The latency isn't too bad, but I do get some crackling and odd
> behavior with ESpeakup running inside a VM.  Part of it could have to do
> with the fact that the guest is a live CD, but I don't have this when
> booting the CD image on real hardware.
>
> Also, sometimes speech won't start in the VM, even though I know sound
> is working.  I designed the CD to play a startup sound which always
> plays in the VM, even when speech doesn't come up.  If I manually start
> espeakup, some characters aren't spoken and the speech acts strangely. 
> I'm not describing it very well, but I haven't seen this kind of
> behavior before. I'm not using Pulse at all and this happens whether I'm
> running KVM in X or not.  The relevance to Orca is I would like to run
> Fedora and/or Sonar in a VM, but I don't want the high latency if there
> is a simple workaround.  I can put the CD image online (699 MB) if
> anyone wants to test.
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