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XPS 12 9Q33 HDMI Audio Issues

I have the XPS 12 9Q33 and I'm trying to connect it to my HDTV through one of its HDMI ports. My system has a display port where I can connect a display port to HDMI adapter. I've tried two of these adapters and three different HDMI cables and in all cases all that transfers is video from my laptop. There isn't any audio at all. I'm not sure if there is a setting that I'm missing that will solve this issue.

FYI: I also have a second laptop that I can connect to my TV without any issues. So, there doesn't seem to be any issue with either my TV or cabling. Thanks