I have a Sharp Aquos LC 37" purchased in 2006. I just purchased a Playbar. I have successfully configured the audio settings on the TV in order to use Xbox One and cable. However I can't seem to get the right settings to use Roku. I set Roku audio to stereo and to Dolby Digital. I tried to play a TV show from Netflix and Amazon and couldn't get either to play audio through the Playbar. My TV has an optical audio output which I have connected to the Playbar. Any suggestions for how to get Roku audio to play through the Playbar?