My asound.conf

/etc/asound.conf
pcm.!default {
    type plug
    slave.pcm "dmixer"
}

pcm.dmixer   {
    type dmix
    ipc_key 1024
    slave {
        pcm "hw:PCH"
	period_time 0
	period_size 1024
	buffer_size 8192
	rate 96000
    }
    bindings {
        0 0
        1 1
    }
}

ctl.dmixer {
    type hw
    card PCH
    device 0
}