Comment 43 for bug 1315212

analog source seem supported by pulseaudio

http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/src/modules/alsa/mixer/paths/analog-input.conf.common?id=67e3925795ad939f2c9acb3aa93122a18672fade

pactl list

do pulseaudio show four input ports : phone, mic, line in and aux

SImple mixer control 'Analog Source',0
  Capabilities: cenum
  Items: 'Phone' 'Mic' 'Line in' 'Aux'
  Item0: 'Mic'
Simple mixer control 'CAPTURE feedback',0
  Capabilities: pvolume
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 255
  Mono:
  Front Left: Playback 0 [0%] [-99999.99dB]
  Front Right: Playback 0 [0%] [-99999.99dB]
Simple mixer control 'Digital Source',0
  Capabilities: cenum
  Items: 'IEC958 out' 'i2s mixer out' 'IEC958 in' 'i2s in' 'AC97 in' 'SRC out'
  Item0: 'i2s in'
Simple mixer control 'Shared Mic/Line in',0
  Capabilities: cenum
  Items: 'Line in' 'Mic in'
  Item0: 'Mic in'