Fading a sound in and out

1

I’m trying to play some background music in my annimation. The music starts to fade in at the 18th frame and I need it to fade out and be stopped by the 930th frame. The sound loops 2 and a half times by the time it reaches frame 930 but just keeps on going when it reaches that point. I can make it fade in or fade out via the property inspector, but I cant make it do both. Does anyone know a solution to this problem??