pcm.dmixer {
    type dmix
    ipc_key 1024
    slave {
        pcm "hw:0" #bzw hw0,0 geht auch nicht
        period_time 0
        period_size 1024
        buffer_size 8192
        rate 44100   #many new cards are 48000 only
    }
    bindings {
        0 0
        1 1
    }
}

pcm.!default {
        type plug
        slave.pcm "dmixer"
}
ctl.!default {
        type hw
        card NVidia
}