I want to connect satellite box which has 3 RCA output system with lg 32LH576D Led tv and philip DSP475U soundbar which has 2 RCA port for audio in and 1 port for subwoofer.
You could use the TV headphone jack to get audio to the soundbar. That way sound from any other sources and the smart apps will come out of the soundbar too. Connect all the cables from the STB to the TV directly if you chose to do it this way.