Sound Output Through miniHDMI port

I am trying to link my 13 inch MacBook Pro to my tv so I can watch videos I have on my computer on my TV. I have the mini HDMI cable converter hooked up. I am getting video from the computer to the TV but no sound. I tried a headphone to RCA converter to get sound to the TV and this works if I have the TV source set to AV. However this only sends sound to the TV and not video. And the way the TV source works I cannot select HDMI video input and av sound input. Is there a way I can force sound output through the miniHDMI cable so I can get sound and video through one cable? I would greatly appreciate any information and help anyone can provide.

See,
iMac (Late 2009), MacBook Pro (Mid 2010), MacBook (13-inch, Mid 2010)- HDMI audio doesn't work with some adapters
Mac computers- About HDMI adapters
Mac mini (Mid 2010)- Frequently asked questions about HDMI

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