Mini DisplayPort/Thunderbolt-HDMI cable

I have an early-2011 15-in. MBP. Last summer when my old CRT TV died, I finally moved on to the modern age of LED TV. Recently I bought a Mini DisplayPort/Thunderbolt-HDMI cable to hook up the MBP to the TV. I thought I read that such a cable would carry both the video and the audio signal. Once I hooked up the MBP to the TV, there was video but no audio. I ended up using an audio cable too.



Is my Mini DP-HDMI cable an older generation cable that does not carry audio signal? Or my MBP does not have a Thunderbolt port but the older Mini DisplayPort?

via ehMac.ca http://ift.tt/1x0Op7r