@biedy You can set the cable receiver to Dolby Digital (depending on which type of cable receiver you have) from the links at the bottom of this page
www.cox.com/.../audio-settings.html I just installed a Bose soundbar at my home recently, you may have to make sure that the TV is set for the proper output for sound and not for the TV speakers (if this is a soundbar that connects straight to the TV, surround sound systems with their own receiver would be different).
Brian
Cox Support Forum Moderator