Comment # 11 on bug 1003812 from Steve Revilak

One small observation (though I'm not sure how significant it is).

alsa-info.txt.2016-11-16 contains these lines:


Simple mixer control 'Front Mic',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 6 [19%] [-25.50dB] [on]
  Front Right: Playback 5 [16%] [-27.00dB] [on]
Simple mixer control 'Front Mic Boost',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 3
  Front Left: 0 [0%] [0.00dB]
  Front Right: 0 [0%] [0.00dB]

I notice that Front Mic Boost has both "Playback channels" and "Capture
Channels", but Front Mic has only Playback channels.

I was a little surprised by this -- to me, a microphone seems like a capture
device.