Mine

pcm.emu10k1{
   type plug
   slave.pcm "hw:0"
}

pcm.hdaintel {
   type plug
   slave.pcm "hw:1"
}

pcm.duplex {
   type asym
   playback.pcm "hdaintel"
   capture.pcm "emu10k1"
}

pcm.dsp {
   slave.pcm "duplex"
}

pcm.dsp0 {
   slave.pcm "duplex"
}

pcm.dsp1 {
   slave.pcm "duplex"
}