I have just purchased a very cheap Sanyo tv from walmart. I have my cable box in hdmi1 and my roku stick in hdmi2. I also have a Bluetooth transmitter that goes to my hearing aids (Mirale Ear). I cannot hear the Roku box through the hearing aids but can hear the tv through the hearing aids when connected to the cable box. The transmitter has RCA audio cables but it does not work on the Roku box. Help.