Asrock p67 professional 用户手册

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To enable Multi-Streaming function, you need to connect a front panel audio cable to the front  

  panel audio header. After restarting your computer, you will fi nd “Mixer” tool on your system.  

  Please select “Mixer ToolBox”               , click “Enable playback multi-streaming”, and click 

  “ok”. Choose “2CH”, “4CH”, “6CH”, or “8CH” and then you are allowed to select “Realtek HDA  

  Primary output” to use Rear Speaker, Central/Bass, and Front Speaker, or select “Realtek         

  HDA Audio 2nd output” to use front panel audio.