[LAU] Channel routing with RME HDSPe AES without HDSPMixer

[francois bluewin]

Hi All,
Needing to use outputs channels 7&8 with an input on 1&2 (MPD as music 
server), I am unable to setup a correct .asoundrc file in order to avoid 
using HDSPmixer (it works well with HDSPMixer but I would have preferred 
to avoid using the graphic interface). My soundcard is device 0. I tried :

pcm.!default {
         type hwplug;
         card 0;
}
         ctl.!default {
         type hwplug;
         card 0;
}
pcm.ttable {
         type route;
         slave.pcm "default";
         slave.channels 2;
         ttable.0.7 1;
         ttable.1.8 1;
}
ctl.ttable {
         type hwplug;
         card 0;
}

but it doesn't work... my ALSA knowledge is rather limited, so it's 
quite complicated for me.
Thank you for the help !
Francois