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Q) No sound comes out after connected to TV using ARC/ Optical (Common):
- Please make sure your TV support ARC output. Then go to Setting in your TV setting
 (may vary due to different brand):
1)Setting > Sound > Select Speaker to:external speaker (optical mode)/ turn off TV Speaker
2)Setting > Sound(audio) > advanced Audio > digital audio output > PCM Setting > Sound(audio) >
 audio output format > PCM/ Dolby off
- Please select the correct input mode.

 Visit for detail:    https://bit.ly/vmaitech       

Q) Why watching Netflix, Disney+, Amazon prime has no sound or noise, some shows have sound
 on Smart TV?
- If your TV is a smart TV. Apps like Netflix was set default audio output is Dolby and DTS for the
 movie, but this sound bar did no support Dolby and DTS, so you will hear the crack sound or no
 sound, please kindly disable the Dolby and DTS on Netflix. Please read back last page under
 Smart TV set up.