The default sound device cannot be opened: A device ID has been used that is out of range for your system. Sound will be disconnected.

I'm getting the error listed in the title with a Windows 7 x64 host running Workstation 7.1.3 and a Ubuntu guest.

I did make a sound-related hardware change on the host today (used onboard audio instead of USB sound card), but sound works perfectly fine on the host.