crackling sounds when playing music

I have a Toshiba 55G310U TV and a Polk Audio soundbar 4000. When viewing TV the sound is great. When I play music from iheart or Pandora I get crackling sounds through the soundbar. The audio connection is a digital optic cable and I'm going through a RoKu box. Help!


  • Hello @willett, most likely the issue lays within the RoKu box since the issue does not happen when connected to the TV. I would think the bar is connected to the TV via the Optical cable as well. If you need more assistance, please email me at
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