I have two soundcards, an integrated alc850 (nforce chipset) and an sb
pci128 (ens1370). Both of them don't support hardware mixing :-( so I
tried to configure dmix for each card.
I use alsa 1.0.10 under debian testing.
I want to start two dmix instances, one for each card, but I noticed
this behaviour: dmix is started for the first used card, and the dmix
device of the other card don't work and viceversa. When using dmix for
one card, I can use without dmix the other.
It's an ipc_key problem? It's a design decision of dmix? Any alternative?
Thanks,
Emilio Scalise
This is my /etc/asound.conf:
############## Card 0 ##############################################
# output software mixing
pcm.dmixer0 {
type dmix
ipc_key 5678292
ipc_key_add_uid yes
slave {
pcm "hw:0,0"
period_time 0
period_size 128
buffer_size 4192
format S16_LE
rate 48000
}
}
# input software mixing
pcm.dsnooper0 {
type dsnoop
ipc_key 5778292
ipc_key_add_uid yes
slave {
pcm "hw:0,0"
period_time 0
period_size 128
buffer_size 4192
format S16_LE
rate 48000
}
}
# full duplex software mixed device
pcm.asymed0 {
type asym
playback.pcm "dmixer0"
capture.pcm "dsnooper0"
}
#for aoss:
pcm.dsp0 {
type plug
slave.pcm "asymed0"
}
ctl.mixer0 {
type hw
card 0
}
############### end of card 0 ######################################
############## Card 1 ##############################################
# output software mixing
pcm.dmixer1 {
type dmix
ipc_key 5678291
ipc_key_add_uid yes
slave {
pcm "hw:1,0"
period_time 0
period_size 128
buffer_size 4192
format S16_LE
rate 48000
}
}
# input software mixing
pcm.dsnooper1 {
type dsnoop
ipc_key 5778291
ipc_key_add_uid yes
slave {
pcm "hw:1,0"
period_time 0
period_size 128
buffer_size 4192
format S16_LE
rate 48000
}
}
# full duplex software mixed device
pcm.asymed1 {
type asym
playback.pcm "dmixer1"
capture.pcm "dsnooper1"
}
#for aoss:
pcm.dsp1 {
type plug
slave.pcm "asymed1"
}
ctl.mixer1 {
type hw
card 1
}
############### end of card 1 ######################################
############### default section ####################################
# assign the default pcm to card 0
pcm.!default {
type plug
slave.pcm "asymed0"
}
############# end of default section ##############################
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