At this point, I'm going to agree with speedlever and the ones that came before us and recommend that those who need this type of functionality just cut to the chase and take advantage of the $14.95 LogMeIn Ignition promo *while it lasts.* Though I'm grateful to the Splashtop folks for several reasons, I don't think you can go wrong with LMI in your toolbox.
P.S. It seems that audio is supported, but it's not on by default ($70.00/year!?). I noticed that here:
and there is this:
Note that GoToMyPC is a subscription app ($10/month). I didn't notice the lag mentioned in the first article and found LMI's proprietary protocol "blazingly fast" myself, although the author's remote computer may have not been Windows. Either that, or the problem may have been corrected. The current version of LMI should be about as good as it gets but, almost nothing surprises me these days.