Poor call quality / packet loss / jitter on HyperV machine

Ok I too believe it is a timing issue. Can you point me in the direction of some examples on how to resolve this? My host machine is running Windows Server 2012 R2, Linux integration services should be installed already. HyperV integration services should also be pre packaged with Centos 6. Under HyperV integration services I have time synchronization set to “off”.

thanks for the help