I had no idea , increase the level and you got something close to a Wem copicat ,
Just took off , luckily the 'listen tab , was first on the list ...
Never had the issue with xp and win7 , might of been a default in win 10
The previous w10 jolly jape , was the microphone select affecting
The ic7100 usb audio in out codecs ..One disappeared ..
For no apparent reason ....After upgrading .... even icom
Dident have the fix for that one ..