Can you make an audio transition in Motion 5? If so, how?

I remember before I upgraded to FCPX the previous version of Final Cut had audio transitions (a cross fade 0Db and a cross fade +3Db). I have not needed an audio transition in Final Cut until now and I couldn't find one in FCPX. So I set out to build one in Motion 5 (I have experience in creating my own generators and transitions in motion) but I could not seem to figure out how to work with audio. If someone could please give me some pointers or let me know if this is even possible that would be great. Thanks, Jobstevenson.