defaults.pcm.!card SB
defaults.ctl.!card SB

pcm.usb {
    type hw
    card U0x46d0x805
}

pcm.!default {
    type asym
    playback.pcm
    {
        type plug
        slave.pcm "dmix"
    }
    capture.pcm
    {
        type plug
        slave.pcm "usb"
    }
}