FM / pcm

/usr/share/alsa/pcm

Name	Size	Mode	Actions
center_lfe.conf	803	0644	edit dl rm
default.conf	760	0644	edit dl rm
dmix.conf	1652	0644	edit dl rm
dpl.conf	645	0644	edit dl rm
dsnoop.conf	1534	0644	edit dl rm
front.conf	802	0644	edit dl rm
hdmi.conf	1186	0644	edit dl rm
iec958.conf	1218	0644	edit dl rm
modem.conf	1312	0644	edit dl rm
rear.conf	742	0644	edit dl rm
side.conf	742	0644	edit dl rm
surround21.conf	923	0644	edit dl rm
surround40.conf	901	0644	edit dl rm
surround41.conf	1004	0644	edit dl rm
surround50.conf	1003	0644	edit dl rm
surround51.conf	954	0644	edit dl rm
surround71.conf	1002	0644	edit dl rm

Edit: /usr/share/alsa/pcm/dsnoop.conf (1534B)

#
# dsnoop
#

pcm.!dsnoop {
	@args [ CARD DEV SUBDEV FORMAT RATE ]
	@args.CARD {
		type string
		default {
			@func refer
			name defaults.pcm.dsnoop.card
		}
	}
	@args.DEV {
		type integer
		default {
			@func refer
			name defaults.pcm.dsnoop.device
		}
	}
	@args.SUBDEV {
		type integer
		default 0
	}
	@args.FORMAT {
		type string
		default {
			@func refer
			name defaults.pcm.dmix.format
		}
	}
	@args.RATE {
		type integer
		default {
			@func refer
			name defaults.pcm.dmix.rate
		}
	}
	type dsnoop
	ipc_key {
		@func refer
		name defaults.pcm.ipc_key
	}	
	ipc_perm {
		@func refer
		name defaults.pcm.ipc_perm
	}
	tstamp_type {
		@func refer
		name defaults.pcm.tstamp_type
	}
	slave {
		pcm {
			type hw
			card $CARD
			device $DEV
			subdevice $SUBDEV
		}
		format $FORMAT
		rate $RATE
		period_size {
			@func refer
			name {
				@func concat
				strings [
					"cards."
					{
						@func card_id
						card $CARD
					}
					".pcm.dsnoop.period_size"
				]
			}
			default 1024
		}		
		period_time {
			@func refer
			name {
				@func concat
				strings [
					"cards."
					{
						@func card_id
						card $CARD
					}
					".pcm.dsnoop.period_time"
				]
			}
			default -1
		}		
		periods {
			@func refer
			name {
				@func concat
				strings [
					"cards."
					{
						@func card_id
						card $CARD
					}
					".pcm.dsnoop.periods"
				]
			}
			default 16
		}
	}
	hint {
		show {
			@func refer
			name defaults.namehint.extended
		}
		description "Direct sample snooping device"
		device_input $DEV
	}
}

cmd: