gw1500 wrote on 10/20/2015 04:20 PM:
> I apologize if this is a duplicate post but I think something happened
> to my subscription and I had to resubscribe.
>
> I just installed alsa (1.0.28-2) from the CentOS 7 repository and cannot
> get it to work. When I try a known good 'wav' file with 'aplayer' all I
> get is a continuous hiss. Can someone help me trouble shoot this? TIA.
Try this solution (from my ALSA-solution on Debian; I've removed pulseaudio):
As root determine the sound card number you want to use as the
default sound card by issuing the shell command
# aplay -l
Save and replace your /etc/asound.conf by the following one
and replace therein the "card" number.
Reboot
Verify that the virtual device named "default" is listed under
# aplay -L
In your applications set the audio device to "default".
Flash plugin by default uses the "default" device, but
for vlc in ~/.config/vlc/vlcrc one must manually disable
the following entry by putting a # in front of the line
alsa-audio-device=
This solution also allows multiple apps to share the same sound card at the
same time.
# /etc/asound.conf
# All AV-apps should/must use the device "default" for sharing to work
pcm.mymixer {
type asym
playback.pcm {
# See plugin:dmix at
http://www.alsa-project.org/alsa-doc/alsa-lib/pcm_plugins.html
type dmix
ipc_key 10001
ipc_perm 0660
ipc_gid audio
slave {
channels 2
pcm {
type hw
card 1
}
}
}
capture.pcm {
type null
}
}
pcm.!default {
type plug
slave.pcm "mymixer"
}
ctl.!default {
type hw
card 1
}
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