[alsa-devel] Capture Source/Input Souce of Alsa sound cards and pulseaudio source

[Raymond Yau]

There are 4 Capture Volume/Switch (Front, Surround, Synth and Wave) and
Capture source of ac97 codec contain 8 input sources (Mic, CD, Video , Aux,
Line, Stereo Mix, Mono Mix and Phone) on SB Live! Platinum

How can ALSA application know whether all 12 sources can be selected for
device 0 ?

card 1: Live [SB Live! Platinum [CT4760P]], device 0: emu10k1 [ADC
Capture/Standard PCM Playback]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: Live [SB Live! Platinum [CT4760P]], device 1: emu10k1 mic [Mic
Capture]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: Live [SB Live! Platinum [CT4760P]], device 2: emu10k1 efx
[Multichannel Capture/PT Playback]
  Subdevices: 1/1
  Subdevice #0: subdevice #0