No Audio from Sound Bar with Generic S-video Red/white Cable Connected to Tv Properly?

my cable box is hdmi connected directly to my tv, as well as my playstation…i've ran through all the inputs to obtain sound, having tried on both the units. do i need an optical cable to be compatible with the hdmi in order to get sound? any knowledgeable help, first hand experience will be appreciated. thanks

Suggestion:

HDMI carries both sound and video. If the devices are plugged in directly to your TV, you should have sound and video on the input that it's plugged into. You don't need an optical cable, just double check to ensure your sound bar is correctly installed and working with other devices.