Comment 7 for bug 1085402

the amp-in at audio input has a 30dB gain

  Node 0x08 [Audio Input] wcaps 0x10011b: Stereo Amp-In
  Control: name="Capture Switch", index=0, device=0
  Control: name="Capture Volume", index=0, device=0
  Device: name="ALC269VB Analog", type="Audio", device=0
  Amp-In caps: ofs=0x0b, nsteps=0x1f, stepsize=0x05, mute=1
  Amp-In vals: [0x1e 0x1e]
  Converter: stream=0, channel=0
  SDI-Select: 0
  PCM:
    rates [0x560]: 44100 48000 96000 192000
    bits [0xe]: 16 20 24
    formats [0x1]: PCM
  Connection: 1
     0x23

control.10 {
  iface MIXER
  name 'Mic Boost Volume'
  value.0 0
  value.1 0
  comment {
   access 'read write'
   type INTEGER
   count 2
   range '0 - 3'
   dbmin 0
   dbmax 3600
   dbvalue.0 0
   dbvalue.1 0
  }
 }
 control.11 {
  iface MIXER
  name 'Internal Mic Boost Volume'
  value.0 3
  value.1 3
  comment {
   access 'read write'
   type INTEGER
   count 2
   range '0 - 3'
   dbmin 0
   dbmax 3600
   dbvalue.0 3600
   dbvalue.1 3600
  }
 }
 control.12 {
  iface MIXER
  name 'Capture Switch'
  value.0 true
  value.1 true
  comment {
   access 'read write'
   type BOOLEAN
   count 2
  }
 }
 control.13 {
  iface MIXER
  name 'Capture Volume'
  value.0 30
  value.1 30
  comment {
   access 'read write'
   type INTEGER
   count 2
   range '0 - 31'
   dbmin -1650
   dbmax 3000
   dbvalue.0 2850
   dbvalue.1 2850
  }
 }