Comment 46 for bug 1252733

control.10 {
  iface MIXER
  name 'Capture Source'
  value 'Internal Mic'
  comment {
   access 'read write'
   type ENUMERATED
   count 1
   item.0 'Headphone Mic'
   item.1 'Headset Mic'
   item.2 'Internal Mic'
  }
 }

 control.17 {
  iface CARD
  name 'Headphone Mic Jack'
  value true
  comment {
   access read
   type BOOLEAN
   count 1
  }
 }
 control.18 {
  iface CARD
  name 'Headset Mic Phantom Jack'
  value true
  comment {
   access read
   type BOOLEAN
   count 1
  }
 }

Headset Mic Phantom Jack - indicates headset jack where hardware can not
      distinguish between headphones and headsets

do capture mean hardware cannot distinguish bewteen headset Mic ,Mic or headphone ?

if driver set it to headphone mode by default

how do the user switch between headphone, headset , mic mode without using pa_backend.c for those who don't use pulseaudio ?