There is a lot confusion between alsa mixer gui and pulse audio
controls. I suggest a clear explanation of each and a warning that
running both means of controlling audio together will result in
unexpected events.

PulseAudio is dynamic and that should be explained clearly. For example,
in the Applications tab nothing is seen until an application actually
uses audio. So if you start Sound Recorder, the Application window in
Volume Control does not show Sound Recorder running. However it does
show as soon as a sound recording session starts.

There are still bugs in PulseAudio and others that might be called
'features':-

If you open Pulse Audio Sound Preferences (right click on speaker icon)
or PulseAudio Volume Control (Applications>Sound&Video) and then open
Sound Recorder you will get an error message and Sound Recorder will not
open. Close Sound Preferences and/or Volume Control and Sound Recorder
will open. You can then open Sound Preferences and Volume Control.

Default configuration setting Analog Stereo Output does not activate
microphones. Default should be 'Analog Stereo Duplex' to enable both
microphones and speakers.

-- 
[regression] Built-in mic not working after pulse updates on Karmic.  Intel 
82801H (ICH8 Family) sound card.
https://bugs.launchpad.net/bugs/409819
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