Surround Sound 5.1

[masque]

Will the following work on Kubuntu for 5.1 sourround sound? ie. 'duplicate front' for mp3 and video files...

sudo gedit ~/.asoundrc

pcm.!default {
  type plug
  slave.pcm "surround51"
  slave.channels 6
  route_policy duplicate
}

pcm.analog {
  type plug
  slave analog_slave;
}

pcm_slave.analog_slave {
    pcm surround51;
    format S32_LE;
}

and then via Ubuntu I

changed the Amarok engine to alsa 5.1. I then used GNOME ALSA MIXER, and turned a few of the options up, and I now have mp3s coming from all speakers

Same procedure, I'm guessing? Just double checking, because without the above script, KMix only shows "duplicate front" for my on-board sound, and not my CA card. (Also wondering if GNOME Alsa mixer will work, should do, I'm guessing).