We are running Central Control Studio v4.2.0.3 with a Stream Deck XL. We need to poll the vMix API for feedback on the state of specific functions in the vMix APi. For example, if SetHeadphoneVolume=0, then we want a Stream Deck button to be red (muted), if not, then black.

How do we do this?

Thanks, Joe. I've watched this video, however, I'm still unclear on how to connect all of the 'device dots' to make this work. Any additional help you can offer would be greatly appreciated.

Here's the basic step I've got so far:

StreamDeck XL CC device > Control > Button 5: vMix Execute Function

• Function: SetHeadphoneVolume
  
• Value: 0
  
• Input: (blank)

StreamDeck XL CC device > Control > Button 13: vMix Execute Function

• Function: SetHeadphoneVolume
  
• Value: 100
  
• Input: (blank)

This works just fine...When I press Button 5 on the StreamDeck, the headphones are muted in vMix I would expect. When I press Button 13 on the StreamDeck, the headphones are unmuted in vMix as I would expect.

Now I need to turn the StreamDeck Button 5 Red and Button 13 Black when muted (Value: 0) and Button 5 Black and Button 13 Red when unmuted (Value equal to 100). Somewhere I'm missing something conceptual and practical in how to use the Virtual Fader CC device to accomplish this. I'm stuck. Anything additional you can offer would be a big help and much appreciated.