alsa-lib/src/conf/cards/VIA8237.conf

#
# Configuration for the VIA8237 chip with 4/6 multi-channel support
#

<confdir:pcm/front.conf>

VIA8237.pcm.front.0 {
	@args [ CARD ]
	@args.CARD {
		type string
	}
	type hw
	card $CARD
	device 0
}	

# default with plughw/dsnoop
# VIA8237 supports multi-playback
VIA8237.pcm.default {
	@args [ CARD ]
	@args.CARD {
		type integer
	}
	type asym
	playback.pcm {
		type plug
		slave.pcm {
			@func concat
			strings [ "hw:" $CARD ]
		}
	}
	capture.pcm {
		type plug
		slave.pcm {
			@func concat
			strings [ "dsnoop:" $CARD ]
		}
	}
}

<confdir:pcm/surround40.conf>

VIA8237.pcm.surround40.0 {
	@args [ CARD ]
	@args.CARD {
		type string
	}
	type hooks
	slave.pcm {
		type hw
		card $CARD
		device 1
	}
	hooks.0 {
		type ctl_elems
		hook_args [
#			{
#				name "Line-In As Surround"
#				device 0
#				preserve true
#				value true
#				lock true
#				optional true
#			}
			{
				name "Surround Down Mix"
				device 0
				preserve true
				value off
				lock true
				optional true
			}
		]
	}
}

<confdir:pcm/surround41.conf>
<confdir:pcm/surround50.conf>
<confdir:pcm/surround51.conf>

VIA8237.pcm.surround51.0 {
	@args [ CARD ]
	@args.CARD {
		type string
	}
	type route
	ttable.0.0 1
	ttable.1.1 1
	ttable.2.4 1
	ttable.3.5 1
	ttable.4.2 1
	ttable.5.3 1
	slave.pcm {
		type hooks
		slave.pcm {
			type hw
			card $CARD
			device 1
		}
		hooks.0 {
			type ctl_elems
			hook_args [
#				{
#					name "Line-In As Surround"
#					device 0
#					preserve true
#					value true
#					lock true
#					optional true
#				}
#				{
#					name "Mic As Center/LFE"
#					device 0
#					preserve true
#					value true
#					lock true
#					optional true
#				}
				{
					name "Surround Down Mix"
					device 0
					preserve true
					value off
					lock true
					optional true
				}
				{
					name "Center/LFE Down Mix"
					device 0
					preserve true
					value off
					lock true
					optional true
				}
			]
		}
	}
	slave.channels 6
}

<confdir:pcm/iec958.conf>

VIA8237.pcm.iec958.0 {
	@args [ CARD AES0 AES1 AES2 AES3 ]
	@args.CARD {
		type string
	}
	@args.AES0 {
		type integer
	}
	@args.AES1 {
		type integer
	}
	@args.AES2 {
		type integer
	}
	@args.AES3 {
		type integer
	}
	type hooks
	slave.pcm {
		type hw
		card $CARD
		device 0
		subdevice 3
	}
	hooks.0 {
		type ctl_elems
		hook_args [
			{
				name "IEC958 Playback AC97-SPSA"
				lock true
				preserve true
				value 3
			}
			{
				name "IEC958 Playback Default"
				lock true
				preserve true
				value [ $AES0 $AES1 $AES2 $AES3 ]
			}
			{
				name "IEC958 Playback Switch"
				lock true
				preserve true
				value true
			}
			{
				name "IEC958 Output Switch"
				lock true
				preserve true
				value true
			}
		]
	}
}