flash (macromedia): Put this on frame 1:

mySound = new Sound()
mySound.setVolume(100);

Depending upon your fps setting, go to the frame that is at 30 seconds and
do this:
mySound.setVolume(80);

on the following keyframe:
mySound.setVolume(50);

on the following keyframe:
mySound.setVolume(20);

on the following keyframe:
mySound.setVolume(10);

on the following keyframe:
mySound.setVolume(0);
mySound.stop();

You can space the keyframes out accordingly to fade as fast or slow as you
need.

--
Dan
*Must Read*http://www.smithmediafusion.com/blog/

[quoted text, click to view]

Is there a way to fade an audio loops volume to 0 after 30 seconds of playing?
I am using a slider bar to set the volume to 40% when the movie loads, but
instead of the audio looping 999 times, I would like to have the volume fade to
0 after 30 seconds and then provide the user a slider bar to turn up the volume
if they want to listen to the looping audio.

Any help would be appreciated!