[sldev] VWR-10311 Enabling lip sync by default

[Mike Monkowski]

Soft wrote:
> That's such an unfortunate (but clever) hack, though. Should we add
> voice level events for scripts that want them? That could still be
> passed up from the viewer, but without all that listener overhead.

Voice level events come from the Vivox server through SLVoice to the 
viewer and are client-specific.  Different avatars on the same sim get 
different voice levels.  Scripts are run on the sim servers.  There's no 
easy connection.

Mike