Hi
@PaulAds What I've done on previous tests is as follows.....
1. Fire up my DAW with speakers on, input 1 is Microphone, input 2 is guitar
2. I'm using an external webcam with a half decent mic (Zoom Q2N) as my audio and video device, don't know what it would be like with PC mic but I'm guessing and external mic is better
3. I can record the Zoom session to test, even if there's no-one on the call so that's how I've tested it earlier
Hope this helps - More than happy to run some tests with you