A:AnswerIt should still work with the HDMI connection. The difference will be that your TV remote will not control the volume. You will need the soundbar's remote for that. A minor inconvenience.
A:AnswerThis should work just fine. The remote actually has a button to adjust voice clarity. I have adjusted voice clarity a couple of times since I bought it and it works well when there is a lot of background noise going on in the show or movie.
A:AnswerNot to be a broken record but make sure everything is plugged in correctly and if you have the instructions read through them again just to make sure... if you do not find an answer there and they have a tech support number give that a shot and worst case scenario is you may have to return it and get a new one.