AS3: How to fade out a soundtrack when a video is loaded into another movieclip?

Hi all!

This is my very first post in this forum… but I appreciate all the information I’ve got as a visitor!! And I hope to contribute very soon.

My issue is: I have a mp3 player running in a movieclip and I want the sound volume to fade off when I press play on a video loaded from Youtube, which is in another movieclip.

In other words, I’d like to toggle the sound on and off when the video is on or off.

As I’m new to AS3, I just couldn’t do it! Can anyone help me out??