I have a Plantronics USB headset that I have been using on a number of computers for several years with no problems. I have had a new laptop (Dell Latitude 5520 running Windows 10 Enterprise Version 21H2 (OS Build 19044.1415)) for about three months and have been using the headset on the same USB-A port without problems until two or three weeks ago when the volume became low. Even with all controls at 100% the volume was lower than I prefer, making online meetings difficult.
Two weeks ago I tried plugging the headset into the other USB-A port and it worked normally again; until this morning when the volume was again low. I tried switching between the two USB-A ports but volume now remains low on both of them. I also have one free USB-C port and as I have a USB-C to USB-A adapter I plugged into that and the volume is again normal.
My concern is that this may not last and if this port also becomes affected by the same problem, I will have no more ports to use and will then be stuck with lowered volume.
As the headset works normally on different ports (and computers) the problem would appear to lie with software or drivers. I have tried uninstalling drivers for the Plantronics Audio 628 USB controller, disconnecting the headset and reconnecting it so the driver will reinstall but this has had no effect. Can anyone suggest other possible solutions?