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From: James Griffin <jmzgriffin@gmail.com>
Subject: Re: Webcam in-built microphone problem
Date: Tue, 28 Jan 2014 17:13:40 +0000 (UTC)
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On 2014-01-28, Matthias Apitz <guru@unixarea.de> wrote:

> If you have /dev/dsp and /dev/mixer the default file
> /compat/linux/etc/alsa/pcm/pcm-oss.conf will work;
>
> 	matthias
>

Ok, got Skype with microphone working. 

Had to edit the file /compat/linux/etc/alsa/pcm/pcm-oss.conf

pcm.oss2 {
	...
	device /dev/dsp2
	...
		Description " ... Webcam"
}

ctl.oss2 {
	...
	device /dev/mixer2
	...
		Description " ... Webcam"
}

... added to the file. So essentially adding a second copy of the text
in there with a second device number; in my case, I chose 2 because
that's what dmesg | grep uaudio showed the camera had been attached to. 

Hope that makes sense???