registrare audio + video desktop

pcm.!default {
   type plug
   slave.pcm multi
   route_policy "duplicate"
}
pcm.multi {
   type multi
   slaves.a.pcm "hw:Loopback,0,0"
   slaves.a.channels 2
   slaves.b.pcm "hw:0,0"
   slaves.b.channels 2
   bindings.0.slave a
   bindings.0.channel 0
   bindings.1.slave a
   bindings.1.channel 1
   bindings.2.slave b
   bindings.2.channel 0
   bindings.3.slave b
   bindings.3.channel 1
}
pcm.loop {
   type plug
   slave.pcm "hw:Loopback,1,0"
}