you have to learn how to recompile alsa driver in order to test and fix the subwoofer , headset, headphone and surround 5.1 since early patching is limited to pin fixup and cannot change DAC assignment
you have to learn how to recompile alsa driver in order to test and fix the subwoofer , headset, headphone and surround 5.1 since early patching is limited to pin fixup and cannot change DAC assignment