Was very frustrated with this for a long time as well but finally figured it out through trial and error. The challenge is in the Audio output format. Not all programs recognize auto so if you change it Dolby Digital 5.1 instead of Auto Select audio, the dialogue will come through. Although it is not as good and there is a slight lag... at least there is sound. For example on apply TV. Go to Settings Audio Output. and Select Dolby Digital 5.1.