Andy - May or may not be the same , this was the resolve of the missing ''one of the '' audio usb links from the ic7100 ..full final,post in 7100 group ..may be the same for the audio cable ..
The audio codec from the 7100 lists as microphone , whereas 'all' the apps where authorised to
Use ‘the’ pc microphone ,
There is a separate , more detailed authorisation field , in the ''Manage sound devices''
I suspect , the default setting was / is Disable .. the 7100 was set to disable
Setting to Enable , codec is now listed as microphone , and showing in the device input lists