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2014 x86_64 

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/usr/share/alsa/pcm/   drwxr-xr-x
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Viewing file:     surround50.conf (992 B)      -rw-r--r--

#
#  Hardware output from 5.0 speakers.
#  Samples must be positioned:
#    chn0 - front left
#    chn1 - front right
#    chn2 - rear left
#    chn3 - rear right
#    chn4 - center
#

pcm.!surround50 {
	@args [ CARD DEV ]
	@args.CARD {
		type string
		default {
			@func getenv
			vars [
				ALSA_SURROUND50_CARD
				ALSA_PCM_CARD
				ALSA_CARD
			]
			default {
				@func refer
				name defaults.pcm.surround50.card
			}
		}
	}
	@args.DEV {
		type integer
		default {
			@func igetenv
			vars [
				ALSA_SURROUND50_DEVICE
			]
			default {
				@func refer
				name defaults.pcm.surround50.device
			}
		}
	}
	type route
	slave.pcm {
		@func refer
		name {
			@func concat
			strings [
				"cards."
				{
					@func card_driver
					card $CARD
				}
				".pcm.surround51." $DEV ":CARD=" $CARD
			]
		}
	}
	slave.channels 6
	ttable.0.0 1
	ttable.1.1 1
	ttable.2.2 1
	ttable.3.3 1
	ttable.4.4 1
	hint {
		description "5.0 Surround output to Front, Center and Rear speakers"
		device $DEV
	}
}