Multiuser/multiseat ALSA, software-mixing, and applications that do not use the default device.
This is the /etc/asound.conf file that works for me:
#SWCONF
#DEV 0
defaults.pcm.card 0
defaults.pcm.device 0
defaults.ctl.card 0
#
# DMIX input device
#
pcm.!output {
type dmix
ipc_key 1234
ipc_key_add_uid false # let multiple users share
ipc_perm 0666 # IPC permissions for multi-user sharing (octal, default 0600)
slave {
pcm "hw:0,0"
period_time 0
period_size 1024
buffer_size 8192
rate 48000
}
}
#
# DSNOOP output device
#
pcm.!input {
type dsnoop
ipc_key 1234
slave {
pcm "hw:0,0"
period_time 0
period_size 1024
rate 48000
}
}
#
# ASYM duplex device
#
pcm.!duplex {
type asym
playback.pcm "output"
capture.pcm "input"
}
#
# Make the duplex device default
#
pcm.!default {
type plug
slave.pcm "duplex"
# This is needed by apps that do not access the default device
# so software-mixing doesn't work (e.g. Amarok 2+, KDE 4+, etc).
# Just select in those apps to use the "ALSA Default Device".
hint {
show on
description "ALSA Default Device"
}
}
ctl.!default {
type plug
slave.pcm "duplex"
}
#
# OSS Compability
#
pcm.!dsp0 {
type plug
slave.pcm "duplex"
}
ctl.!mixer0 {
type hw
card 0
}
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