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uname -a: Linux li456-155.members.linode.com 3.10.0-1160.92.1.el7.x86_64 #1 SMP Tue Jun 20 11:48:01
UTC 2023 x86_64 

uid=48(apache) gid=48(apache) groups=48(apache) 

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/usr/share/alsa/cards/   drwxr-xr-x
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Viewing file:     vc4-hdmi.conf (820 B)      -rw-r--r--

#
# Configuration for the VC4-HDMI sound card using software IEC958
# subframe conversion
#

<confdir:pcm/front.conf>

vc4-hdmi.pcm.front.0 {
	@args [ CARD ]
	@args.CARD {
		type string
	}
	type hw
	card $CARD
}

# default with dmix
vc4-hdmi.pcm.default {
	@args [ CARD ]
	@args.CARD {
		type string
	}
	type asym
	playback.pcm {
		type plug
		slave.pcm {
			@func concat
			strings [ "dmix:" $CARD ]
		}
	}
}

<confdir:pcm/iec958.conf>

vc4-hdmi.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 iec958
	slave {
		format IEC958_SUBFRAME_LE
		pcm {
			type plug
			slave.pcm {
				type hw
				card $CARD
			}
		}
	}
	status [ $AES0 $AES1 $AES2 $AES3 ]
}