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Hallo,
i want sound output to my Audigy2 and HDMI simultaneous. That works with the .asoundrc below. But the problem is that only one app can access the card.
$ aplay /usr/share/sounds/alsa/Front_Center.wav & aplay /usr/share/sounds/alsa/Front_Center.wav
[1] 15640
ALSA lib pcm_dmix.c:1156:(snd_pcm_dmix_open) unable to open slave
aplay: main:807: audio open error: Invalid argument
$ Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
[1]+ Done aplay /usr/share/sounds/alsa/Front_Center.wav
The Audigy2 has a hardware mixer and it does work properly. Wine for example doesn't use pcm.default but somehow the card directly and its the only app that can mix sound into pcm.default at the moment.
Creating another dmix with plug:both is not possible (Invalid type 'multi' for slave PCM). dmix needs 'hw:x' for interrupt access.
So, how can i allow multiple apps to access/share the pcm.default?
.asoundrc:
pcm.!default plug:both
ctl.!default {
type hw
card Audigy2
}
pcm.both {
type route;
slave.pcm {
type multi;
slaves.a.pcm "myaudigy2";
slaves.b.pcm "mynvidia";
slaves.a.channels 2;
slaves.b.channels 2;
bindings.0.slave a;
bindings.0.channel 0;
bindings.1.slave a;
bindings.1.channel 1;
bindings.2.slave b;
bindings.2.channel 0;
bindings.3.slave b;
bindings.3.channel 1;
}
ttable.0.0 1;
ttable.1.1 1;
ttable.0.2 1;
ttable.1.3 1;
}
ctl.both {
type hw;
card Audigy2;
}
pcm.myaudigy2 {
type dmix
ipc_key 1024
slave {
pcm "hw:0,0"
period_time 0
period_size 2048
buffer_size 65536
buffer_time 0
periods 128
#rate 48000
channels 2
}
bindings {
0 0
1 1
}
}
ctl.myaudigy2 {
type hw
card "Audigy2"
}
pcm.mynvidia {
type dmix
ipc_key 2048
slave {
pcm "hw:1,7"
period_time 0
period_size 2048
buffer_size 65536
buffer_time 0
periods 128
#rate 48000
channels 2
}
bindings {
0 0
1 1
}
}
ctl.mynvidia {
type hw
card "NVidia"
}
sys2064
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