There are only two ways to get digital audio between your TV and soundbar, or your TV and receiver, or really between any piece of gear that transmits audio in a home A/V system: HDMI and optical.
I've been looking for an answer to this for 2 weeks and couldn't find anything, so I thought I'd ask here... I recently upgraded from a Tivo Series 2 to a Tivo Premiere (loving the un-converted ...