use advanced override mode to change the pin default of node 0x1a
and disable node 0x16 change [Jack] to [N/A] in order to assign DAC and volume control to subwoofer
you need to set as boot default instead of dynamic reconfiguration
speaker-test -Dhw:0,0 -c4 -t wav
to find out the subwoofer use left, right or both of rear channels
use advanced override mode to change the pin default of node 0x1a
and disable node 0x16 change [Jack] to [N/A] in order to assign DAC and volume control to subwoofer
you need to set as boot default instead of dynamic reconfiguration
speaker-test -Dhw:0,0 -c4 -t wav
to find out the subwoofer use left, right or both of rear channels