I suggest you start by looking here:
http://www.linux.com/feature/119926

On 25 Jan, 22:12, Mike <[email protected]> wrote:
> http://pastebin.ca/1317950
>
> I have a very simple sound setup, and I'm very confused on how to
> configure it I have done some tinkering so things might be a little
> off of what is expected.
>
> I would really like to know how Alsa relates to PulseAudio.  Things
> like:
>
> Is one dependant on the other?
> How do I properly configure the devices with PulseAudio?
> How do I properly configure the devices with Alsa?
> [Important]What configuration files are there for both and what is the
> appropriate place to set things?
>
> Situation:
> I have 1 USB headset that I use and no internal sound, or sound cards
>
> $ cat /proc/asound/cards
>  1 [default        ]: USB-Audio - Microsoft LifeChat LX-3000
>                       Microsoft LifeChat LX-3000  at usb-0000:00:1a.
> 0-2, full speed
>
> $ cat /proc/asound/devices
>   2:        : timer
>   3:        : sequencer
>   4: [ 1- 0]: digital audio playback
>   5: [ 1- 0]: digital audio capture
>   6: [ 1]   : control
>
> The speakers work perfectly, however the microphone has only worked
> once but I know that it does in fact work, and only till I restarted
> the program (gstreamer-properties)
>
> How do I begin to figure out how to configure this, it seems there are
> tons and tons of applications to let you configure which device to
> use, but not how to configure the device except for ~/.asoundrc  And I
> would love to use ~/.asoundrc except that it has the most confusing
> syntax I've ever seen and no explanations on parameters.
>
> I'd appreciate any replies and after being ignored for 3 days on the
> irc channels #alsa and #ubuntu I'll even settle for a Hi there, sorry
> I can't help you.
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