I have a fairly old Polaroid TV with HDMI and I am trying to connect my LG soundbar with a wireless subwoofer to it since the sound on the tv speakers have gone bad (and do not want to really buy a new tv). The soundbar has an optical line but when I hooked it up to Fios STB I could still hear sound coming from the TV speakers. This stuff confuses me so not sure if the soundbar needs to be directly hooked up to the TV or if their is setting on STB to make sure only sound comes from the soundbar. Thanks