[orca-list] Sound latency in KVM

[Tony Baechler <tony baechler net>]

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.