pcm.dmixer  {
 	type dmix
 	ipc_key 1024
 	slave {
		pcm "hw:0"
		period_time 0
		period_size 1024
		buffer_size 4096
	}
	bindings {
		0 0
		1 1
	}
}

pcm.speex {
	type speex
	slave.pcm "plughw:0"
}

pcm.cf {
    type plug
    slave {
	pcm "speex"
	format S16_LE
	channels 1
    }
}

pcm.ns {
	 type asym
	playback.pcm "plug:dmixer"
	capture.pcm "cf"
}

pcm.!default "ns"