cat /proc/asound/pcm
01-01: Bt87x Analog : Bt87x Analog : capture 1
01-00: Bt87x Digital : Bt87x Digital : capture 1
00-02: CMI8738-MC6 : C-Media PCI IEC958 : playback 1 : capture 1
00-01: CMI8738-MC6 : C-Media PCI 2nd DAC : playback 1
00-00: CMI8738-MC6 : C-Media PCI DAC/ADC : playback 1 : capture 1
02-01: VIA 8233-Pre : VIA 8233-Pre : playback 1 : capture 1
02-00: VIA 8233-Pre : VIA 8233-Pre : playback 4 : capture 1

amixer -c 1 cget name='Capture Source'
numid=3,iface=MIXER,name='Capture Source'
  ; type=ENUMERATED,access=rw------,values=1,items=3
  ; Item #0 'TV Tuner'
  ; Item #1 'FM'
  ; Item #2 'Mic/Line'
  : values=0

lspci:
00:08.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10)
00:09.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 02)
00:09.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 02)
00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237 AC97 Audio Controller (rev 10)