I connected my rapsy to an USB 7.1 Surround Sound Card. The card is recognized correct but sound_test c8 only plays sound at Front Left and Right(Stereo). Also if I play sound from the webinterface, the front speakers are working, the others just play the low frequeces.
I found an solution that worked for an similar way but don’t know how to adapt it to pimusicbox: https://www.raspberrypi.org/forums/viewtopic.php?t=166374
Can someone help me with this? It would be totally fine to mirror the sound from the front left to side and rear left and front right to side and rear right and center. Can you tell me where I do have to input these options?
With Best regards