Differences between version 2 and previous revision of KnowledgeBase/AlsaEqual.
Other diffs: Previous Major Revision, Previous Author
| Newer page: | version 2 | Last edited on Saturday, 15 September 2012 23:02:27 | by CyberLeo | Revert |
| Older page: | version 1 | Last edited on Saturday, 15 September 2012 22:58:05 | by CyberLeo | Revert |
@@ -33,9 +33,9 @@
slave.pcm asymed;
}
</code>
-Use 'alsamixer -D equal' to change the equalizer settings
+Use 'alsamixer -D equal' to change the equalizer settings; they will be saved and restored by the OS boot scripts just like any other soundcard volume setting.
And here's a way to switch presets:
<code brush="bash">
#!/bin/sh
version 2
Install media-plugins/alsaequal Configure thus:
/etc/asound.conf:
# Set default card and device; check /proc/asound/cards for the names to use in !card :
defaults.pcm.!card PCH
defaults.ctl.!card PCH
defaults.pcm.!device 0
defaults.ctl.!device 0
ctl.equal {
type equal;
}
pcm.plugequal {
type equal;
# 32-bit programs will fail because they can't load 64-bit ladspa plugins; point to both in order:
path "/usr/lib64/ladspa;/usr/lib32/ladspa";
slave.pcm "plug:dmix";
}
pcm.equal {
type plug;
slave.pcm plugequal;
}
pcm.asymed {
type asym;
playback.pcm "plugequal";
capture.pcm "dsnoop";
}
pcm.!default {
type plug;
slave.pcm asymed;
}
Use 'alsamixer -D equal' to change the equalizer settings; they will be saved and restored by the OS boot scripts just like any other soundcard volume setting.
And here's a way to switch presets:
#!/bin/sh
# Mine: "80 74 68 66 66 66 64 62 58 56"
# Flat: "65 65 65 65 65 65 65 65 65 65"
set_equalizer_curve() {
curve="${*}"
ctl=0
for point in ${curve}
do
ctl=$(( ${ctl} + 1 ))
echo cset numid=${ctl} ${point}
done | amixer -D equal -s
}
profile="${1:-mine}"
case "${profile}" in
mine) curve="80 74 68 66 66 66 64 62 58 56" ;;
flat) curve="65 65 65 65 65 65 65 65 65 65" ;;
*) echo "Unknown profile ${profile}" >&2 ;;
esac
[ "${curve}" ] && set_equalizer_curve "${curve}"