Audio no longer is working on 3.1.2

[Kevin Oberman]

Since I upgraded my VirtualBox on FreeBSD 8-Stable to 3.1.2 with a
Windows 7 client, audio is unusable. It is "beating" as if about half
the audio packets are missing. Video is fine. I hear this for all audio,
including the Windows login and logout sounds, as well, so it is not
network related. 

Other than the sound, my VB is working fine, but the sound used to work
with earlier versions, so something clearly regressed.

Are others seeing this? Any ideas as to the cause?
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4  EADA 927D EBB3 987B 3751