built-in mic configuration [compaq presario laptop]

[Alexander Kapshuk]

I would like to be able to use the built-in mic to record audio and to 
use Skype with. An external mic seems to work out-of-the-box.

Any input would be appreciated.

:; uname -a
FreeBSD box2 9.0-RELEASE-p4 FreeBSD 9.0-RELEASE-p4 #0: Fri Aug 17 
21:53:39 EEST 2012     root at box2:/usr/obj/usr/src/sys/GENERIC  i386

:; dmesg | grep pcm
pcm0: <HDA IDT 92HD75B3 PCM #0 Analog> at cad 0 nid 1 on hdac0
pcm1: <HDA NVidia (Unknown) PCM #0 Digital> at cad 2 nid 1 on hdac0