So I have 2 playback devices - mine subwoofer system (Line In), and Headphones (Jack), but sound is playing to both, I mute line in, but sound still is going to both.

What to do? Realtek Sound Card.

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  • It depends on your hardware, for example - askubuntu.com/questions/150887/… . Identify your sound card - – Panther Apr 21 '17 at 16:03
  • my soundcard is realtek high definition audo, intel – Matas Esu Apr 21 '17 at 16:37
  • realtek is a brand, use lshw to show the chip. The link I gave you is for one realtek chip set, may guide you. – Panther Apr 21 '17 at 16:45

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