Hm..mám to samý akorát v bledě modrým a funguje mi to..Co máš za ZK?
#########################################################
#This is the standard setting (see: "!default")
#This profile, the default loaded, upmixes stereo sound to 5.1.
pcm.!default {
        type plug
        slave.pcm "surround51"
        slave.channels 6
        route_policy duplicate
}
########################################################
#This is the normal spdif output profile (optical, toslink).
pcm.!spdif {
    type plug
    slave.pcm "hw:0,1"
}
#######################################################
#This is what one could call the "factory default setting", in other words, it only plays the actual channels. so if you fx want to watch a 5.1 movie, on the analog output, this is the option you want. 
pcm.analog {
    type plug
    slave analog_slave;
}
pcm_slave.analog_slave {
        pcm surround51;
        format S32_LE;
}