Mine

pcm.hda-intel {
   type hw
   card  
}
       
ctl.hda-intel {
   type hw
   card 0
}

pcm.!dmix {
type plug
slave {
pcm surround71
channels 8
}
}
pcm.!default {
type plug
slave.pcm "dmix"
slave.channels 8
route_policy duplicate
}