.asoundrc:
   pcm.!default {
       type plug
       slave.pcm "equalized";
   }

   pcm.equalized {
       type ladspa
       slave.pcm "plug:dmix";
       path "/usr/lib/ladspa";
       plugins [
           {
               id 1773
               input {
                   controls [ 0 0 0 -4 -6 -15 -4 -6 10 ]
               }
           }
       ]
   }
------------
conn@inspiron:~$ vlc Black\ Magic\ Woman-Santana.mp3 
VLC media player 0.8.6c Janus
ALSA lib pcm_plug.c:746:(snd_pcm_plug_hw_refine_schange) Unable to find an usable slave format for 'plug:dmix'
ALSA lib pcm_plug.c:750:(snd_pcm_plug_hw_refine_schange) Format: FLOAT_LE
ALSA lib pcm_plug.c:755:(snd_pcm_plug_hw_refine_schange) Slave format: S16_LE
ALSA lib pcm_plug.c:840:(snd_pcm_plug_hw_refine_cchange) Unable to find an usable client format
ALSA lib pcm_plug.c:844:(snd_pcm_plug_hw_refine_cchange) Format: FLOAT_LE
ALSA lib pcm_plug.c:849:(snd_pcm_plug_hw_refine_cchange) Slave format: S16_LE
ALSA lib pcm_params.c:2152:(snd_pcm_hw_refine_slave) Slave PCM not usable
[00000281] main playlist: stopping playback