Quick enable internal microphone on Sony Vaio VGN-FZ140E snd-hda-intel

user@laptop:/$ lspci | grep -i audio
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
user@laptop:/$ amixer cset numid=5,iface=MIXER,name='Capture Source' 1
numid=5,iface=MIXER,name='Capture Source'
  ; type=ENUMERATED,access=rw------,values=1,items=3
  ; Item #0 'Mic Jack'
  ; Item #1 'Internal Mic'
  ; Item #2 'PCM'
  : values=1
user@laptop:/$ amixer cset numid=4,iface=MIXER,name='Capture Switch' on
numid=4,iface=MIXER,name='Capture Switch'
  ; type=BOOLEAN,access=rw------,values=2
  : values=on,on