MythTV sharing ALSA with other Desktop

See : http://alsa.opensrc.org/index.php/AlsaSharing

Make udev assign the right permissions to the sound devices, but putting the following in /etc/udev/rules.d/90-alsa-extra.rules :

# Fix up sound devices for all users
NAME=="snd/*", MODE="0666"

In /etc/asound.conf, something along these lines :

pcm.card0 {
   type hw
   card 0
# mmap_emulation true
}
pcm.dmixer {
   type dmix
   ipc_key 36739
   ipc_key_add_uid false
   ipc_perm 0666
   slave {
#        pcm "hw:0,0"
       pcm "card0"
       period_time 0
       period_size 1024
       buffer_size 8192
       #periods 128
       #rate 44100
       rate 48000
    }
    bindings {
       0 0
       1 1
    }
}

ctl.mixer0 {
   type hw
   card 0
}
pcm.dsnoop0 {
   type dsnoop
   ipc_key 36741
   slave {
       pcm "card0"
   }
}
pcm.asym0 {
   type asym
   playback.pcm "dmixer"
   capture.pcm "dsnoop0"
}
pcm.pasym0 {
   type plug
   slave.pcm "asym0"
}
# 'dsp0' is espected by OSS emulation etc.
pcm.dsp0 {
   type plug
   slave.pcm "asym0"
}
ctl.dsp0 {
   type hw
   card 0
}
pcm.!default {
   type plug
   slave.pcm "asym0"
}