Thanks for the reply, duh on my part assumed 2020 from the notice in the windows update section said may 2020 is coming - which I will not install until I see an updated iRig driver!.
Suspect Win 10 version 2004 and the iRig ASIO driver (designed to work with win 10 version 1909) are not playing well together.
Read the following when searching web for any problems with the win 10 ver 2004 update:
https://wintechlab.com/no-sound-in-windows-10/"How to fix Audio sound problems in Windows 10 version 2004
posted on April 27, 2020 Filed Under: How To
No Audio sound from your laptop’s speaker is a common problem, especially after recent windows 10 update, a number of users report no sound from their system speaker. And the common reason for this issue is the Corrupted, Incompatible Audio Driver"
Saw Asio4all worked which leaves the iRig ASIO driver suspect.
FWIW when I used the HD2 (now happily using the Stomp I/O) used asio4all until the irig ASIO driver was released without a problem. The iRig driver worked without a problem on win 10 ver 1909. I used a powered speaker when not using headphones connected to the headphone jack of the HD2 so I could hear youtube and instructional videos through windows at the same time. There is guidance on this forum on how to set up it up to do that.
Hope they fix the driver problem ASAP!