Playing a embedded sound in an external .swf

programming flash
1

Is there a way to play a sound that has been embedded in an externally loaded .swf from the main .swf (the .swf that loaded it)?

Playing the embeded sound from within the same .swf is easy but how is it possible from the main .swf?

var drum:DrumSound = new DrumSound(); 
var channel:SoundChannel = drum.play();