defaults.pcm.rate_converter "linear"

# spk represents the physical sink (playback)
pcm.spk
{
	type plug
	slave.pcm "hw:wm8524audio,0"
}

# mic represents the physical source (capture)
pcm.mic
{
	type plug
	slave.pcm "hw:micfilaudio,0"
}

# Following two definitions define the Virtual Sink (playback) stream
# pwloop stands for playback write loopback
pcm.pwloop
{
	type hw
	card Loopback
	device 1
	subdevice 0
}

# prloop stands for playback read loopback
pcm.prloop
{
	type hw
	card Loopback
	device 0
	subdevice 0
}

# Following two definitions define the Virtual Source (capture) stream
# cwloop stands for capture write loopback
pcm.cwloop
{
	type hw
	card Loopback
	device 1
	subdevice 1
}

# crloop stands for capture read loopback
pcm.crloop
{
	type hw
	card Loopback
	device 0
	subdevice 1
}

# As multiple sources may play audio at the same time, we use the mix
# plugin. Otherwise only a single playback source would be allowed.
pcm.mix
{
	type dmix
	ipc_key 1001
	slave {
		pcm "pwloop"
		format S32_LE
		rate 48000
		channels 2
		buffer_size 512
		period_size 128
	}
}

pcm.split
{
	type dsnoop
	ipc_key 1002
	slave {
		pcm "crloop"
		format S32_LE
		rate 16000
		channels 1
		buffer_size 512
		period_size 128
	}
}

# Applications like Alexa read/write from/to default stream.
# Unfortunately we can't have default capture stream and
# default playback stream. ALSA offers the asym plugin, which
# allows to define a default capture/playback stream as one device.
# The plug plugin is introduced for automatic sample rate and format
# conversion.
pcm.!default
{
	type asym
	playback.pcm "plug:mix"
	capture.pcm "plug:split"
}