/usr/share/alsa/pcm/dsnoop.conf is in libasound2-data 1.1.3-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# 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_gid {
@func refer
name defaults.pcm.ipc_gid
}
ipc_perm {
@func refer
name defaults.pcm.ipc_perm
}
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_driver
card $CARD
}
".pcm.dsnoop.period_size"
]
}
default 1024
}
period_time {
@func refer
name {
@func concat
strings [
"cards."
{
@func card_driver
card $CARD
}
".pcm.dsnoop.period_time"
]
}
default -1
}
periods {
@func refer
name {
@func concat
strings [
"cards."
{
@func card_driver
card $CARD
}
".pcm.dsnoop.periods"
]
}
default 16
}
}
hint {
show {
@func refer
name defaults.namehint.extended
}
description "Direct sample snooping device"
device_input $DEV
}
}
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