Today, I was working on a flash website for a client when I ran into an interesting problem: My Action-Scripted sounds weren't playing from a internally loaded swf.

The setup was simple:
Using Flash 8, I made a main movie that loads the interface, and when another section is clicked it loads within the main swf. I was also using the same script that I usually do for sound, which always seems to work (and is subsequently the one Adobe/Macromedia recommends).

Like so:

function buttonSound() {
	blip = new Sound();
	blip.attachSound("blipHover");
	blip.setVolume(100);
	blip.start();
}

My script was right, and my linkage was right:

It was a total mystery to me, so as usuall, I chose not to google the problem, and I experimented. Oddly on the first try I discovered that if you are calling an exported sound in a swf loaded withen a swf, the sound needs to be exported in the main swf and not the loaded swf.

Weird stuff.