QuietComfort 15 mic does not work with Y adapters
QC 15 with the inline remote and microphone cable.
Mic works fine with my MacBook's 4-ring jack and with my phone using a 4-ring to USB adapter.
It does not work with my Dell Optiplex 7010 PC using either of these 4-ring jack to dual 3-ring plug Y adapters:
There doesn't seem to be any software issue with Windows 10. When I run www.onlinemictest.com I get a prompt to allow it to use the microphone.