New
#1651
Keith, Keith! Go to this post by Andre and see if it will fix your sound problem. It fixed mine and @magilla's!
If you don't have the IDT sound card, click on your own sound card's High Definition Audio CODEC in Step 1 and go from there, paying special attention to #6!
Hope it works for you.
Oops, forgot the link!
New Windows 10 Insider Preview Fast + Skip Build 18298 (19H1) -Dec. 10 Insider - Page 17 - Windows 10 Forums
BTW, second time 18298 installed a lot faster than the first!