Hi, Martinez, Thank you for your time. I tried your method, and sadly it didn't work. I then messed around disabling, uninstalling, reinstalling microphones, headphones and speakers, and none of that work either. Until yesterday when, by chance, I discovered that I could switch speakers to headphones just as advertised. Alleluia, I thought, but… Today it doesn't work again. There are times when I absolutely hate computers! I will keep trying of course because when it does what I want it to do, it's a great joy and helps my workflow enormously. But for the moment I have to do some of that work and stop messing about with a hardware. Once again, thank you for your time and your advice. With all good wishes.
I have a machine running Windows 10, fully updated. I have a pair of speakers plugged in to the rear jack and d they appear in the audio switching window choices at the bottom right of the screen (Speakers (Realtek High Definition Audio)) along with my Headset (Plantronics C-310M). Both the speakers and the headset ping happily when tested in the Sound/Playback Devices window. But the switch doesn't work: I cannot select the headset. I thought it might be an AMD High Definition Audio Device G246HL which appears in the Playback devices but I uninstalled that to find it came back on rebooting, so I disabled it but to no avail. I would be very grateful if anyone were able to point me in the right direction to solve this very irritating problem. Thanks in advance