MacBook Air Record While Listening Through Headphones

[SashaFierce]

I like to use GarageBand to record and playback vocals. Is there a way to plug headphones into the MacBook Air and playback the live sound through the headphones from the mic. Basically I'm trying to use my MacBook as a ear monitor transmitter, so that I can sing and hear myself live through in-ear headphones.

 

[The Viking]

With what mic? Built-in?

My experience (even with external audio devices) is that there is a profoundly distracting and annoying lag between your input and hearing yourself back on headphones. Do yourself a favor and get a nice USB mic with zero-latency built-in headphone out.

My favorite is just under $100 on Amazon.
http://www.amazon.com/Blue-Microphones-Yeti-USB-Microphone/dp/B002VA464S/

I think you'd regret going pretty much any other route... I know I did.