Could someone explain this?

[acfusion29]

I'm kinda confused.

What's the difference between the Audio and Headphone Jack?

Thanks.

 

[72930]

The audio one is input

http://docs.info.apple.com/article.html?artnum=303722

 

[astudentis]

headphone=connect speaker
audio in=connect a microphone for voice coversations (though MB has a built in mic)

 

[acfusion29]

Thanks guys.