So I have just purchased a new Samsung JU7500 UHD TV. I have an LG soundbar connected directly to the TV via an optical cable. I have an XB1 connected to the TV via HDMI and when the soundbar is on appx level 15 volume its nice and loud with the Xbox, yet when I switch to TV on the Samsung TV the same volume level is really low and I have to crank it upto appx level 28 to get it to the same level as what it is like on the Xbox. Why is this??