SOLVED How to have audio come through OBS when using Video Capture Device.

[macd44]

In my case the HDMI input/output in Fire TV was set to a different HDMI to the one I was using for Audio. As soon as I corrected it in Fire TV I got sound and was able to use the Fire TV remote to control the sound level. I then locked the sound in OBS Studio. Hope this helps.
All the best.
Roy