сабж. в /etc/asound.conf -
pcm.dmix_ {
ipc_key 1024
type dmix
slave {
pcm "hw:0,0"
period_time 0
period_size 1024
buffer_size 4096
rate 44100
}
bindings {
0 0
1 1
}
}
pcm.dsnoop_ {
ipc_key 1025
type dsnoop
slave.pcm "hw:0,0"
}
pcm.asym_ {
type asym
playback.pcm "dmix_"
capture.pcm "dsnoop_"
}
pcm.!default {
type plug
slave.pcm "asym_"
}
ctl.!default {
type hw
card 0
}
но aplay -L всё равно говорит
null
Discard all samples (playback) or generate zero samples (capture)
pulse
PulseAudio Sound Server
dmix_
dsnoop_
asym_
default
Playback/recording through the PulseAudio sound server
