How to stop an embedded sound file?

programming flash
1

I have a sound file already embedded in the flash file. Linked it up, gave it a class name whateverSound. Now, in my actionscript, I can do

var _sound:whateverSound = new whateverSound();
_sound.play();

This works fine, but how do I stop the sound? There is no stop() method, and the close() only works if I loaded the sound externally. Thanks.