Controlling a MC question

[font=verdana, arial, helvetica][size=2]is it possible to control a MC by letting it know if a sound is playing or not?

i was thinking of this:
[indent][font=verdana,arial,helvetica][size=1]quote:[/size][/font]
if (_root.firstSound == “true”) {
_root.audioButton.gotoAndPlay(3);
}

if (_root.firstSund == “false”) {
_root.audioButton.gotoAndPlay(1);
}
[/indent]

would that be correct???[/size][/font]