I just got a 5.1 surround sound. Logitech Z906. Windows 10. Connected it using the 3.5mm jacks at the back of the PC. Green, Black, and Orange-ish. Green goes in the stereo out. Orange and Black go one row above for the Center/sub and RearLeft RearRight speakers respectively. I can't get it to recognize anything other than stero sound. All 5.1 speakers clearly have power because there is audible sound from all of them when playing video/audio files.
Things I've tried at least twice:
Driver updates: Did them automatically AND manually for the mobo and speakers.
Double and triple check physical connection.
Right Click Windows Sound Icon > Sounds > Configure > Speaker Setup > Confirm 5.1 > Click individual speakers to test, only Front Left/Right output sound when tested.
Realtek HD Audio Manager > Speaker Configuration > 5.1 Speaker > Check boxes for Center, Sub, Rear pair, Full-range speakers Front left/ and right, surrournd sound, and enable bass mgmt. Click play button to test and Front Left/Right are fine, but again no sound from the others. Even did a clean install. for Realtek HD Audio. No luck.
Is it possible I need a soundcard? Is there something remedial I'm missing? Asus Z170-A Prime mobo, acquired 2017, advertises support for up to 7.1.
nevermind found thr isssue.
when connecting the z906 to a pc you need to disable the surround sound light on the control dongle. because logitech has 4 states displayed by 3 lights with the hidden state presenting as no state even though it is a state. dumbest design decision imaginable