I have the 37CS560LG TV without an Optical Input,but with USB, Red and Yellow plug in. I bought a LG Sound Bar NB3530A with Optical Cables in. What kind of adapter cable do I need to make this connection work?
According to the specs on your LG TV it does not have any audio outputs so you cannot connect anything to it for better audio. If you use a set top box you can connect the audio from that into the soundbar directly.