[alsa-devel] dmix - unable to open slave
nenad.sljivic at rt-rk.com
Mon Oct 24 15:17:16 CEST 2011
I posted the same questions on alsa-user group, but no one could help me, so
I might have more luck here.
I am trying to enable a software mixer on an MIPS based embedded target
board using alsa-lib v1.0.23.
When I try to play two audio files using these commands:
#aplay -vDplug:dmix song1.wav &
#aplay -vDplug:dmix song2.wav
mixing works fine.
For some strange reason when I try the same thing using the "nenad_dmix"
device I am getting the following error:
ALSA lib pcm_dmix.c:1068:(snd_pcm_dmix_open) unable to open slave
aplay: main:654: audio open error: Invalid argument
The error occurs while trying to open device for the second time (song2.wav
playback). At the same time, song1.wav plays fine.
The content of my .asoundrc is given bellow:
I narrowed down the problem using the strace tool and it showed me this:
open("/dev/snd/pcmC0D0p", O_RDWR|O_APPEND|O_NONBLOCK|O_CLOEXEC) = -1 EINVAL
What can be the difference between using the plug:dmix and some virtual
device like nenad_dmix in this case ??
Could some of you help me to resolve this issue?
More information about the Alsa-devel