[litzdog911]

You need the Composite Video/Audio "dongle" cable ....
http://www.solidsignal.com/pview.asp?p=10pincompos

This will provide the RCA red/white analog audio signal for your TV.

Not sure what digital-to-analog audio adapter you're using, but that should work too. Be sure to disable "DD5.1 Audio" in the C31's Audio Setup Menu.

 

[litzdog911]

Thanks for this suggestion in any case, but this solution plugs into the 10 pin port on the C31. I wanted to find a way to plug to the digital audio port and convert that to RCA. I thought I had the right converter for that purpose.

Does the digital audio port on the C31 even work? Maybe it is just cosmetic?

Yes, the digital audio port should be active all of the time. You need something like this ....
http://www.monoprice.com/product?p_id=6884