How Do I Ramp Auido Tracks For Adaptive Music?

I’m trying to add adaptive music to my first project. All tracks are started when I hit play. I can get track volumes to change with a trigger volume, but I don’t know how to ramp the audio volume for smooth transitions.

Ah, found the answer on this site.

https://forums.unrealengine.com/showthread.php?92535-Dynamic-music