Alsa equalizer

coolaman · 2008-08-09 06:02:35

Hi, i want to have a realtime equalizer for alsa for my system ( my laptop's speakers are not very good ) .

For now, i play with asoundrc and ladspa plugins but it's not very useful .

I found this ( it is in early development ) but it don't work for me.If someone get it working : http://www.thedigitalmachine.net/alsaequal.html

NoOneImportant · 2008-08-09 16:21:47

this looks interesting

[edit]

wow, this is nice

update: I was able to get it working with speaker-test, but not mpd (yet)

update 2: ok, got it working with almost everything except MPD. Even by setting it as default.

here's an ~/.asoundrc (aka /etc/asound.conf) to use for reference

pcm.plugequal{
  type equal
    slave.pcm "plug:dmix"
}

ctl.equal{
  type equal
}
         
#I couldn't get this working, but I just assume it's essential
pcm.equal{
  type plug
  slave.pcm "plug:dmix"
}
             
pcm.!default {
  type plug                                                                                      
  slave.pcm "plugequal"                                                                          
}

The equalizer can only be accessed through the ncurses alsamixer by running alsamixer -D equal

Also, the 30hz band doesn't seem to do anything.

Last edited by NoOneImportant (2008-08-10 04:43:28)

masterLoki · 2009-07-20 06:25:06

Hi, as for now it seems to be work out of box and works great. I got it working with your NoOneImportant's asoundrc (put it on my path).
It also works with MPD (using git for AUR)
alsaequal is on AUR.

Last edited by masterLoki (2009-07-20 06:25:22)

sand_man · 2009-07-20 07:29:09

what's it like on resources?

akira86 · 2009-08-29 01:45:35

@sand_man : for me it's +10 %

@masterLoki : could you post your mpd.conf and your asound.conf (or rc)

for me alsaequal doesn't work with gstreamer and mpd. (it work well with mplayer)

here is my asound.conf :

ctl.equalizerV {
  type equal
  library "/usr/lib/ladspa/mbeq_1197.so"
  module "mbeq"
}

pcm.plugEqualizerV {
  type equal
  slave.pcm  "plug:dmix"
  library "/usr/lib/ladspa/mbeq_1197.so"
  module "mbeq"
}

#pcm.!default {
pcm.equalizerV {
   type plug
   slave.pcm plugEqualizerV
}

pcm.plugEqualizerF {
  type ladspa

  # The output from the EQ can either go direct to a hardware device
  # (if you have a hardware mixer, e.g. SBLive/Audigy) or it can go
  # to the software mixer shown here.
  #slave.pcm "plughw:0,0"
  slave.pcm "plug:dmix"

  # Sometimes you may need to specify the path to the plugins,
  # especially if you've just installed them.  Once you've logged
  # out/restarted this shouldn't be necessary, but if you get errors
  # about being unable to find plugins, try uncommenting this.
  path "/usr/lib/ladspa"

  plugins [
    {
      label mbeq
      id 1197
      input {
        #this setting is here by example, edit to your own taste
        #bands: 50hz, 100hz, 156hz, 220hz, 311hz, 440hz, 622hz, 880hz, 1250hz, 1750hz, 25000hz,
        #3500hz, 5000hz, 10000hz, 20000hz
        # de -70 a 30
        controls [ -70 -30 -10 0 0 0 0 0 0 0 0 0 0 0 0 ]
      }
    }
  ]
}

pcm.!default {
type plug
slave.pcm plugEqualizerF
}

I use ladspa as a normal equalizer and alsaequal to found the correct setting of ladspa.
Sometime I use alsaequal with mplayer for divx...

here is the command :

alsamixer -D equalizerV

to adjust alsaequal
and

mplayer -ao alsa:device=equalizerV  MyMovie.avi

jakobm · 2009-11-07 22:54:21

akira86 wrote:

for me alsaequal doesn't work with gstreamer and mpd. (it work well with mplayer)

I encoutered this problem, too.

Then, I figured out that alsaequal does *not* store the eq settings system-wide but on a per-user basis ($HOME/.alsaequal.bin). mpd runs as user mpd (check your mpd configuration), so copying .alsaequal.bin to /var/lib/mpd/ solved the problem for me.

Alternatively you can use su, alsamixer and probably chsh to set up eq settings for mpd.

akira86 · 2009-11-08 01:38:42

thanks for the tips :-)

iode1 · 2011-11-30 12:15:03

Could anyone help direct me to a solution for this return:

[iode1@arch ~]$ alsamixer -D equalizerV
ALSA lib control.c:882:(snd_ctl_open_noupdate) Invalid CTL equalizerV
cannot open mixer: No such file or directory

Thanks..

karol · 2011-11-30 16:30:48

What's in your asound.conf?

bernarcher · 2011-11-30 19:50:04

iode1, this thread is more than two years old and your problem does not really fit here. Please open a new thread of your own and ask again.

Besides, be sure to read our forum etiquette on necro bumping.

Closing.

Arch Linux

#1 2008-08-09 06:02:35

Alsa equalizer

#2 2008-08-09 16:21:47

Re: Alsa equalizer

#3 2009-07-20 06:25:06

Re: Alsa equalizer

#4 2009-07-20 07:29:09

Re: Alsa equalizer

#5 2009-08-29 01:45:35

Re: Alsa equalizer

#6 2009-11-07 22:54:21

Re: Alsa equalizer

#7 2009-11-08 01:38:42

Re: Alsa equalizer

#8 2011-11-30 12:15:03

Re: Alsa equalizer

#9 2011-11-30 16:30:48

Re: Alsa equalizer

#10 2011-11-30 19:50:04

Re: Alsa equalizer

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