Hi all,
I'm attempting to introduce software volume control for a device on a
system running openWRT. I'm able to control the volume for the device
using alsamixer, but for values OTHER than 100 and 0, the sound being
played contains noise. In other words: if the volume is set to 0
(muted), nothing is heard, if the volume is set to 100, sounds are heard
without any interference, for values [1 - 99] noise is heard along with
the sounds being played.
Has anyone experienced similar issues?
Any suggestions as to what to try?
Thanks!
P
# uname -a
Linux OpenWrt 2.6.28.9 #3 Wed Jul 15 13:41:25 PDT 2009 armv5teb unknown
# alsamixer
AlsaMixer v1.0.19
# cat /etc/asound.conf
pcm.dmixed1 {
type dmix
ipc_key 2048
slave {
pcm "hw:0"
rate 8000
period_time 0
period_size 1024
buffer_size 8192
channels 2
}
bindings {
0 0
1 1
}
}
pcm.play_channel1 {
type plug
slave {
pcm "playback_vol_channel1"
channels 2
}
ttable.0.0 1
}
pcm.playback_vol_channel1 {
type softvol
slave {
pcm "dmixed1"
}
control {
name "PlaybackVolumeChannel1"
card 1
}
}
ctl.play_channel1 {
type hw
card 0
}
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