# 6 channel dmix:
pcm.dmix-front {
        type dmix
        ipc_key 1024
        ipc_key_add_uid false
        ipc_perm 0666
        slave {
                pcm "hw:0,0"
                channels 2
                period_size 1024
                buffer_size 4096
        }
}
 
pcm.dmix-sur {
        type dmix
        ipc_key 2048
        ipc_key_add_uid false
        ipc_perm 0666
        slave {
                pcm "hw:0,1"
                channels 2
                period_size 1024
                buffer_size 4096
        }
}
 
pcm.dmix-clfe {
        type dmix
        ipc_key 3072
        ipc_key_add_uid false
        ipc_perm 0666
        slave {
                pcm "hw:0,2"
                channels 2
                period_size 1024
                buffer_size 4096
        }
}
 
pcm.dmix-six {
        type multi;
        slaves.a.pcm "dmix-front";
        slaves.a.channels 2;
        slaves.b.pcm "dmix-sur";
        slaves.b.channels 2;
        slaves.c.pcm "dmix-clfe";
        slaves.c.channels 2;
        bindings.0.slave a;
        bindings.0.channel 0;
        bindings.1.slave a;
        bindings.1.channel 1;
        bindings.2.slave b;
        bindings.2.channel 0;
        bindings.3.slave b;
        bindings.3.channel 1;
        bindings.4.slave c;
        bindings.4.channel 0;
        bindings.5.slave c;
        bindings.5.channel 1;
}
 
ctl.dmix-six {
        type hw
        card 0
}
 
# upmixing: 
pcm.ch51dup {
        type route
        slave.pcm "dmix-six"
        slave.channels 6
        ttable.0.0 1.2
        ttable.1.1 1.2
        ttable.2.2 1
        ttable.3.3 1
        ttable.4.4 0.4
        ttable.5.5 0.4
}
 
#pcm.duplex {
#       type asym
#       playback.pcm "ch51dup" # upmix first
#       capture.pcm "hw:0"
#}
 
# change default device:
pcm.!default {
        type softvol 
        slave.pcm "ch51dup"
        control {
                name "Software Master"
                card 0
        }
}
 
ctl.!default {
        type hw
        card 0
}