Roy,
Perfect -Spot on advice!
My laptop sound setup is finally back on track.
My recorded (YouTube) karaoke video sound tracks are now both visible AND audible===plus, my DJ software is once again audible via my performance speakers and I can (once again) adjust sound levels using DJ software sound controls.
I have a attached a PDF of my settings for anyone interested in my Hoster 5.51.01 setup supporting my audio system via a mixer that feeds speakers from my laptop headset port.
Thanks a ton!
Best,
Gwen