>The answer is probably related to the fact that Vista vms and XP vms do not
>use the same emulated sound device. Check the device manager in each.
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>the emulated hardware and their drivers. How to address that I don't know,
>but there it is.
Not to mention that Vista is a bigger OS with more overhead, and so
uses more CPU which affects the performance of emulated hardware like
the sound card.
Adding more RAM may help, as moving the Vista Vm to a separate hard
drive, additionally, a faster multicore CPU will also help reduce the
possibility of sound issues, but you can't escape it completely.

Signature
Cheers,
Steve Jain, Virtual Machine MVP
http://vpc.essjae.com/
I do not work for Microsoft.
novecento.alessio.leoncini - 13 May 2008 08:57 GMT
Thanks for answers, i try to add more RAM but nothing improvement of my
issue : (
>>The answer is probably related to the fact that Vista vms and XP vms do
>>not
[quoted text clipped - 19 lines]
> drive, additionally, a faster multicore CPU will also help reduce the
> possibility of sound issues, but you can't escape it completely.