How it Works & How to Play

You Blow into the mouthpiece with which causes the reed to vibrate, which creates sound. To play notes the clarinettist covers the holes with fingers or keys. each note requires a different combination of notes, allowing air to travel different lengths before escaping the uncovered holes.

Skip to 7:59 to learn how to play the E note :)
http://www.youtube.com/watch?v=zz8AuolJwfI