Orei DA34 Digital to Analog Audio Decoder SPDIF/Coaxial 5.1-Channel Input to RCA L/R/3.5mm Headphone Output Decodes DTS/Dolby Digital source digital audio to analog 2.0CH stereo audio output (RCA L/R and 3.5mm Headphone), Supports Digital Audio Input: SPDIF (Optical), Coaxial - Make sure switch to the correct input on the side Supports simultaneous RCA L/R and 3.5mm Headphone outputs Make sure the the plastic removed. And the Optical Cable is pushed in completely. TROUBLESHOOT: Signal from the TV goes into SPDIF (Optical), or Coxial input of the DA34 and The output of RCA or Headphones will go into your analog speakers or headphones. Make sure the power adapter is connect properly. And all the cables are inserted all the way in. If there is still no sound, please change the TV Audio out to PCM Only from the TV Menu.