I have a Home Theater set up and I always use my television volume it is good not to but old habits die hard. But just enough volume to help blend the center channel in, due to my center speaker resting right on top of the television I like a more direct dialogue. If you wish not to have TV volume just simply mute or turn the volume all the way down. If your surround sound is working just fine and not interfering with the HDMI set up than the TV volume can have the day off by turning it all the way down. By the way it is normal for your box to put out sound from those analog or stereo cables that gives you the option to watch TV without the surround sound from your Home Theater being used.