line in

[Eric Forat]

I've been trying to connect a headset and mike to my Ti and the mike 
doesn't work. And I tested it with three mikes and nothing. I did select 
sys prefs/ sound/ input/ line in, but nothing happens. The built-in is 
fine, but I need a unidirectional mike close to my mouth so I don't have 
to shout. Is that micro-jack in the back, between the phone jack and the 
video out, really  a line in ?  Or must I go to a USB  model? Any ideas?
Best, eric