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In Settings->Audio>Devices: Make sure your input devices as configured to the correct cable inputs you wish to use in your stream.
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In this case I have two additional inputs from CABLE-B Output and CABLE-A output for VOIP and Music. Also take the time to toggle the check boxes in the Output>Recording tab for how many devices you plan to use. This is an important part to get right, the buffer allows an audio device to cache the data it needs to play the next part of the audio. Obviously having a larger buffer WILL increase latency so it’s important to get this as low as possible. I recommend not using any virtual/hardware inputs on the WDM driver and leave it exclusively to the outputs of A1/A2/A3 etc.
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