Debut Elgato Video & Audio Solved

[jlam]

OK after many trials on mac and windows here is what works on Windows 10 at least. Separate the video and audio inputs between two USB ports as follows:

Install the Elgato device and then plug into a usb port. 

Purchase a USB audio input device for example ....Sabrent Aluminum USB External Stereo Sound Adapter for Windows and Mac. $7.49 on amazon.

Plug in into another usb port.

In the audio options for Debut select Microphone (USB audio device) If you go into the system mixer in windows you can select or deselect AGC (auto gain control) for the Sabrent device

Plug your external audio into the Sabrent. It has a mini plug input so you may need an adapter.

Victory  Nothing quite like hours of trial and error and a pile of technology.