How do I connect my westinghouse tv model DWM40F1G and rca model RTS7015B sound bar?

[neilsonl]

I've tried a regular audio cable with the red and white ends, but that isn't working and I have no idea why, or how to fix it. If it makes any difference, I don't have cable. I have a Roku and a Blue-Ray player I plug in through the HDMI.

 

[americanaudiophile]

TV has coaxial digital audio output and headphone out.
Soundbar has coaxial digital audio input and aux input.
You can use the digital connection or the headphone to aux connection.
Either will be fine.
Check the TV manual on how to turn on and configure the TV audio output.