Comment 12 for bug 637066

how about the Mic ?

you have to send your patch to alsa development mailing list

control.2 {
  iface MIXER
  name 'Mic Playback Volume'
  value 23
  comment {
   access 'read write'
   type INTEGER
   count 1
   range '0 - 32'
   dbmin 0
   dbmax 4781
   dbvalue.0 3436
  }
 }