When you conect a tv t a CPU will you get sound?

Answer 1

If you connect it over a HDMI Connection and the graphics card in question running the interface allows for sound over HDMI, then yes.

If you mean "Will I get sound from my computer as I always have.. " Then yes, you will as long as your primary audio output remains selected to your normal means (analog out, SPDIF, headphones, what have you.. )

Hope this helps!