Good evening list
I've found an .asoundrc configuration file that allows me to play a
single audio file which then outputs to two sound cards simultaneously.
This works perfectly for two of the sounds cards in my system: a HRT
Music Streamer II DAC, and a Terratec Aureon Space. For the on-board
Intel soundcard, however, this causes the following error when trying to
play an audio file with aplay:
rune@runescomp:~$ aplay /media/thesafe/musictest/gravity.wav
Playing WAVE '/media/thesafe/musictest/gravity.wav' : Signed 16 bit
Little Endian, Rate 44100 Hz, Stereo
aplay: pcm_params.c:170: snd1_pcm_hw_param_get_min: Assertion `!
snd_interval_empty(i)' failed.
Aborted by signal Aborted...
I'm attaching my .asoundrc, and it is line 33:
slaves.b.pcm "plughw:CARD=Intel,DEV=0"; # Intel (this doesn't work)
that causes the problem. If I change this line to use "hw:" instead of
"plughw:" it works when using aplay, but not when using a GNOME audio
player like Exaile to play audio.
Also, this command works:
aplay -D plughw:CARD=Intel,DEV=0 /media/thesafe/musictest/gravity.wav
It is only when I use "plughw:" in my .asoundrc that the above issue
presents itself.
I'm using ALSA 1.0.24 from the Natty Narwhal Ubuntu repositories.
#----
# .asoundrc file designed to expand 2 channels through device 'clone_output'
# to output 2 channels to multiple devices
#
# caveats : no mixed output (no crossfading, no multiple applications) also
# sync will drift between the devices (rarely do i see mine drift though)
#
# designed around a nvidia ION1 zotac board. You may need to change
# device names.
# Use aplay -l to find device numbers
#
# questions contact Loto_Bak on forums.xbmc.org
#----
#cat /proc/asound/card3/pcm0p/sub0/hw_params /proc/asound/card1/pcm0p/sub0/hw_params
pcm.!default {
type plug
slave.pcm "clone_output"
}
pcm.clone_output {
type plug
slave.pcm "4channel_expander"
}
pcm.multi_pcm_device {
type multi;
slaves.a.pcm "plughw:CARD=II,DEV=0"; # HRT
slaves.a.channels 2;
#slaves.b.pcm "plughw:CARD=T71Space,DEV=0"; # Terratec
slaves.b.pcm "plughw:CARD=Intel,DEV=0"; # Intel
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;
}
ctl.multi_pcm_device {
type hw;
card 0;
}
pcm.4channel_expander {
type route;
slave.pcm "multi_pcm_device";
slave.channels 4;
ttable.0.0 1;
ttable.1.1 1;
ttable.0.2 1;
ttable.1.3 1;
# ttable.0.4 1;
# ttable.1.5 1;
}
ctl.4channel_expander {
type hw;
card 0;
}
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